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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_BrokerageCommissionsTableTextBlock" xlink:to="lab_usl_BrokerageCommissionsTableTextBlock" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xlink:label="loc_usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xml:lang="en-US">Per Unit Performance Data And Other Supplemental Financial Data Table [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xml:lang="en-US">Per Unit Performance Data and Other Supplemental Financial Data</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xml:lang="en-US">Per Unit Performance Data and Other Supplemental Financial Data [Table Text Block]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xlink:to="lab_usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract" xml:lang="en-US">Statement Of Financial Position [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract" xlink:to="lab_us-gaap_StatementOfFinancialPositionAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementTable" xml:lang="en-US">Statement [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_StatementTable" xml:lang="en-US">Statement [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable" xlink:to="lab_us-gaap_StatementTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_LegalEntityAxis" xml:lang="en-US">Legal Entity [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_dei_LegalEntityAxis" xml:lang="en-US">Legal Entity [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis" xlink:to="lab_dei_LegalEntityAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityDomain" xml:lang="en-US">Entity [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_dei_EntityDomain" xml:lang="en-US">Entity [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain" xlink:to="lab_dei_EntityDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementLineItems" xml:lang="en-US">Statement [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_StatementLineItems" xml:lang="en-US">Statement [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems" xlink:to="lab_us-gaap_StatementLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetsAbstract" xml:lang="en-US">Assets [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AssetsAbstract" xml:lang="en-US">Assets</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="lab_us-gaap_AssetsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xml:lang="en-US">Cash and cash equivalents (Notes 2 and 5)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xml:lang="en-US">Cash and Cash Equivalents, beginning of year</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xml:lang="en-US">Cash and Cash Equivalents, end of year</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" xml:lang="en-US">Financial Instruments Owned At Fair Value [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" xml:lang="en-US">Equity in trading accounts:</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" xlink:to="lab_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Cash" xml:lang="en-US">Cash</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_Cash" xml:lang="en-US">Cash and cash equivalents</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Cash" xlink:to="lab_us-gaap_Cash" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xlink:label="loc_usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xml:lang="en-US">Unrealized Gain Loss On Open Commodity Futures Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xml:lang="en-US">Unrealized gain (loss) on open commodity futures contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xml:lang="en-US">Unrealized Gain (Loss) on Open Commodity Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xml:lang="en-US">Unrealized gain (loss) on open commodity futures contracts.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xlink:to="lab_usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_NetAssetValuePerUnit" xlink:label="loc_usl_NetAssetValuePerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_NetAssetValuePerUnit" xml:lang="en-US">Net Asset Value Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_usl_NetAssetValuePerUnit" xml:lang="en-US">Net asset value, beginning of year</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_NetAssetValuePerUnit" xml:lang="en-US">Net asset value per share</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_usl_NetAssetValuePerUnit" xml:lang="en-US">Net asset value, end of year</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_NetAssetValuePerUnit" xml:lang="en-US">Net asset value per unit.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_NetAssetValuePerUnit" xlink:to="lab_usl_NetAssetValuePerUnit" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalNotesAbstract" xlink:label="loc_us-gaap_PartnersCapitalNotesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalNotesAbstract" xml:lang="en-US">Partners Capital Notes [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnersCapitalNotesAbstract" xml:lang="en-US">Liabilities and Partners&#39; Capital</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalNotesAbstract" xlink:to="lab_us-gaap_PartnersCapitalNotesAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DueToCorrespondentBrokers" xlink:label="loc_us-gaap_DueToCorrespondentBrokers" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DueToCorrespondentBrokers" xml:lang="en-US">Due to Correspondent Brokers</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_DueToCorrespondentBrokers" xml:lang="en-US">Payable due to Broker</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DueToCorrespondentBrokers" xlink:to="lab_us-gaap_DueToCorrespondentBrokers" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xlink:label="loc_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xml:lang="en-US">Due to Officers or Stockholders</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xml:lang="en-US">General Partner management fees payable (Note 3)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xlink:to="lab_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xml:lang="en-US">Accrued Professional Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xml:lang="en-US">Professional fees payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xlink:to="lab_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xlink:label="loc_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xml:lang="en-US">Commissions Payable To Broker Dealers And Clearing Organizations</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xml:lang="en-US">Brokerage commissions payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xlink:to="lab_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ManagementFeePayable" xlink:label="loc_us-gaap_ManagementFeePayable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ManagementFeePayable" xml:lang="en-US">Management Fee Payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ManagementFeePayable" xml:lang="en-US">Directors&#39; fees and insurance payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ManagementFeePayable" xlink:to="lab_us-gaap_ManagementFeePayable" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_LicenseFeesPayableCurrentAndNoncurrent" xlink:label="loc_usl_LicenseFeesPayableCurrentAndNoncurrent" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_LicenseFeesPayableCurrentAndNoncurrent" xml:lang="en-US">License Fees Payable Current And Noncurrent</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_LicenseFeesPayableCurrentAndNoncurrent" xml:lang="en-US">License fees payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_LicenseFeesPayableCurrentAndNoncurrent" xml:lang="en-US">License fees payable Current and Noncurrent.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_LicenseFeesPayableCurrentAndNoncurrent" xlink:to="lab_usl_LicenseFeesPayableCurrentAndNoncurrent" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeneralPartnersCapitalAccount" xlink:label="loc_us-gaap_GeneralPartnersCapitalAccount" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GeneralPartnersCapitalAccount" xml:lang="en-US">General Partners Capital Account</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_GeneralPartnersCapitalAccount" xml:lang="en-US">General Partner</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralPartnersCapitalAccount" xlink:to="lab_us-gaap_GeneralPartnersCapitalAccount" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LimitedPartnersCapitalAccount" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccount" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccount" xml:lang="en-US">Limited Partners Capital Account</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccount" xml:lang="en-US">Limited Partners</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccount" xlink:to="lab_us-gaap_LimitedPartnersCapitalAccount" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapital" xlink:label="loc_us-gaap_PartnersCapital" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapital" xml:lang="en-US">Partners Capital</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_PartnersCapital" xml:lang="en-US">Total Partners&#39; Capital</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_PartnersCapital" xml:lang="en-US">Beginning Balances</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_PartnersCapital" xml:lang="en-US">Ending Balances</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapital" xlink:to="lab_us-gaap_PartnersCapital" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xml:lang="en-US">Limited Partners Capital Account Units Outstanding</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xml:lang="en-US">Limited Partners&#39; shares outstanding</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xlink:to="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_MarketValuePerUnit" xlink:label="loc_usl_MarketValuePerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_MarketValuePerUnit" xml:lang="en-US">Market Value Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_MarketValuePerUnit" xml:lang="en-US">Market value per share</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_MarketValuePerUnit" xml:lang="en-US">Market value per unit.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_MarketValuePerUnit" xlink:to="lab_usl_MarketValuePerUnit" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xlink:label="loc_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xml:lang="en-US">Fair Value Measurement Inputs Disclosure [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xml:lang="en-US">Valuation of Securities Using Fair Value Hierarchy</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xlink:to="lab_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xml:lang="en-US">Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xml:lang="en-US">Fair Value of Derivative Instruments</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:to="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xml:lang="en-US">Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xml:lang="en-US">Effect of Derivative Instruments on the Statements of Operations</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:to="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xlink:label="loc_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xml:lang="en-US">Organization Consolidation And Presentation Of Financial Statements Disclosure [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xlink:to="lab_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentAxis" xlink:label="loc_invest_InvestmentAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentAxis" xml:lang="en-US">Investment [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentAxis" xml:lang="en-US">Investment</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentAxis" xlink:to="lab_invest_InvestmentAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentDomain" xlink:label="loc_invest_InvestmentDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentDomain" xml:lang="en-US">Investment [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentDomain" xml:lang="en-US">Investment [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentDomain" xlink:to="lab_invest_InvestmentDomain" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_PeriodAxis" xlink:label="loc_usl_PeriodAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_PeriodAxis" xml:lang="en-US">Period [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_PeriodAxis" xml:lang="en-US">Period [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_PeriodAxis" xlink:to="lab_usl_PeriodAxis" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_PeriodDomain" xlink:label="loc_usl_PeriodDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_PeriodDomain" xml:lang="en-US">Period [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_PeriodDomain" xml:lang="en-US">Period [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_PeriodDomain" xml:lang="en-US">Period [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_PeriodDomain" xlink:to="lab_usl_PeriodDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScenarioForecastMember" xml:lang="en-US">Scenario Forecast [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScenarioForecastMember" xml:lang="en-US">Prior to July 1, 2011</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScenarioForecastMember" xlink:to="lab_us-gaap_ScenarioForecastMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentTypeAxis" xml:lang="en-US">Investment Type [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InvestmentTypeAxis" xml:lang="en-US">Investment Type</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeAxis" xlink:to="lab_us-gaap_InvestmentTypeAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember" xml:lang="en-US">Investments [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember" xml:lang="en-US">Investment Type Categorization [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember" xlink:to="lab_us-gaap_InvestmentTypeCategorizationMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_OpenFuturesContractsLongMember" xlink:label="loc_usl_OpenFuturesContractsLongMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_OpenFuturesContractsLongMember" xml:lang="en-US">Open Futures Contracts Long [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_OpenFuturesContractsLongMember" xml:lang="en-US">Open Futures Contracts, Long</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_OpenFuturesContractsLongMember" xml:lang="en-US">Open Futures Contracts, Long</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_OpenFuturesContractsLongMember" xlink:to="lab_usl_OpenFuturesContractsLongMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSecuritiesClassAxis" xlink:label="loc_invest_InvestmentSecuritiesClassAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentSecuritiesClassAxis" xml:lang="en-US">Investment Securities Class [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentSecuritiesClassAxis" xml:lang="en-US">Investment Securities Class</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSecuritiesClassAxis" xlink:to="lab_invest_InvestmentSecuritiesClassAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSecuritiesClassDomain" xlink:label="loc_invest_InvestmentSecuritiesClassDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentSecuritiesClassDomain" xml:lang="en-US">Investment Securities Class [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentSecuritiesClassDomain" xml:lang="en-US">Investment Securities Class [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSecuritiesClassDomain" xlink:to="lab_invest_InvestmentSecuritiesClassDomain" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_CreationBasketsMember" xlink:label="loc_usl_CreationBasketsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_CreationBasketsMember" xml:lang="en-US">Creation Baskets [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_CreationBasketsMember" xml:lang="en-US">Creation Baskets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_CreationBasketsMember" xml:lang="en-US">Creation Baskets [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_CreationBasketsMember" xlink:to="lab_usl_CreationBasketsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentGeographicRegionAxis" xlink:label="loc_invest_InvestmentGeographicRegionAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentGeographicRegionAxis" xml:lang="en-US">Investment Geographic Region [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentGeographicRegionAxis" xml:lang="en-US">Investment Geographic Region</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentGeographicRegionAxis" xlink:to="lab_invest_InvestmentGeographicRegionAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentGeographicRegionDomain" xlink:label="loc_invest_InvestmentGeographicRegionDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentGeographicRegionDomain" xml:lang="en-US">Investment Geographic Region [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentGeographicRegionDomain" xml:lang="en-US">Investment Geographic Region [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentGeographicRegionDomain" xlink:to="lab_invest_InvestmentGeographicRegionDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_US" xlink:label="loc_country_US" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_country_US" xml:lang="en-US">UNITED STATES</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_country_US" xml:lang="en-US">United States</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_US" xlink:to="lab_country_US" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xlink:label="loc_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xml:lang="en-US">Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xlink:to="lab_usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentOwnedBalanceContracts" xlink:label="loc_us-gaap_InvestmentOwnedBalanceContracts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentOwnedBalanceContracts" xml:lang="en-US">Investment Owned Balance Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InvestmentOwnedBalanceContracts" xml:lang="en-US">Number of Contracts</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedBalanceContracts" xlink:to="lab_us-gaap_InvestmentOwnedBalanceContracts" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_NumberOfUnitsPerBasket" xlink:label="loc_usl_NumberOfUnitsPerBasket" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_NumberOfUnitsPerBasket" xml:lang="en-US">Number Of Units Per Basket</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_NumberOfUnitsPerBasket" xml:lang="en-US">Number of shares per basket</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_NumberOfUnitsPerBasket" xml:lang="en-US">Number of Units per Basket</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_NumberOfUnitsPerBasket" xlink:to="lab_usl_NumberOfUnitsPerBasket" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_FeePaidPerOrder" xlink:label="loc_usl_FeePaidPerOrder" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_FeePaidPerOrder" xml:lang="en-US">Fee Paid Per Order</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_FeePaidPerOrder" xml:lang="en-US">Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_FeePaidPerOrder" xml:lang="en-US">Fee Paid Per Order</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_FeePaidPerOrder" xlink:to="lab_usl_FeePaidPerOrder" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UnitsIssuedDuringPeriodUnitsNewIssues" xlink:label="loc_usl_UnitsIssuedDuringPeriodUnitsNewIssues" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UnitsIssuedDuringPeriodUnitsNewIssues" xml:lang="en-US">Units Issued During Period Units New Issues</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UnitsIssuedDuringPeriodUnitsNewIssues" xml:lang="en-US">Number of shares issued</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_UnitsIssuedDuringPeriodUnitsNewIssues" xml:lang="en-US">Units Issued During Period, Units, New Issues</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UnitsIssuedDuringPeriodUnitsNewIssues" xlink:to="lab_usl_UnitsIssuedDuringPeriodUnitsNewIssues" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UnitsIssuedDuringPeriodValueNewIssues" xlink:label="loc_usl_UnitsIssuedDuringPeriodValueNewIssues" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UnitsIssuedDuringPeriodValueNewIssues" xml:lang="en-US">Units Issued During Period Value New Issues</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UnitsIssuedDuringPeriodValueNewIssues" xml:lang="en-US">Value of shares issued</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_UnitsIssuedDuringPeriodValueNewIssues" xml:lang="en-US">Units Issued During Period, Value, New Issues</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UnitsIssuedDuringPeriodValueNewIssues" xlink:to="lab_usl_UnitsIssuedDuringPeriodValueNewIssues" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_NumberOfRegisteredUnits" xlink:label="loc_usl_NumberOfRegisteredUnits" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_NumberOfRegisteredUnits" xml:lang="en-US">Number Of Registered Units</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_NumberOfRegisteredUnits" xml:lang="en-US">Number of registered shares</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_NumberOfRegisteredUnits" xml:lang="en-US">Number of Registered Units</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_NumberOfRegisteredUnits" xlink:to="lab_usl_NumberOfRegisteredUnits" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_SignificantAccountingPoliciesTable" xlink:label="loc_usl_SignificantAccountingPoliciesTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_SignificantAccountingPoliciesTable" xml:lang="en-US">Significant Accounting Policies [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_SignificantAccountingPoliciesTable" xml:lang="en-US">Significant Accounting Policies [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_SignificantAccountingPoliciesTable" xml:lang="en-US">Significant Accounting Policies [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_SignificantAccountingPoliciesTable" xlink:to="lab_usl_SignificantAccountingPoliciesTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RangeAxis" xml:lang="en-US">Range [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RangeAxis" xml:lang="en-US">Range [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RangeAxis" xlink:to="lab_us-gaap_RangeAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RangeMember" xml:lang="en-US">Range [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RangeMember" xml:lang="en-US">Range [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RangeMember" xlink:to="lab_us-gaap_RangeMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_SignificantAccountingPoliciesLineItems" xlink:label="loc_usl_SignificantAccountingPoliciesLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_SignificantAccountingPoliciesLineItems" xml:lang="en-US">Significant Accounting Policies [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_SignificantAccountingPoliciesLineItems" xml:lang="en-US">Significant Accounting Policies [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_SignificantAccountingPoliciesLineItems" xml:lang="en-US">Significant Accounting Policies [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_SignificantAccountingPoliciesLineItems" xlink:to="lab_usl_SignificantAccountingPoliciesLineItems" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_NumberOfSharesPerBasket" xlink:label="loc_usl_NumberOfSharesPerBasket" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_NumberOfSharesPerBasket" xml:lang="en-US">Number of Shares per basket</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_NumberOfSharesPerBasket" xml:lang="en-US">Number of Shares per Basket.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_NumberOfSharesPerBasket" xlink:to="lab_usl_NumberOfSharesPerBasket" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xml:lang="en-US">Schedule Of Related Party Transactions By Related Party [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_us-gaap_TypeOfArrangementAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TypeOfArrangementAxis" xml:lang="en-US">Type Of Arrangement [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_TypeOfArrangementAxis" xml:lang="en-US">Type of Arrangement and Non-arrangement Transactions [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TypeOfArrangementAxis" xlink:to="lab_us-gaap_TypeOfArrangementAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ArrangementsAndNonarrangementTransactionsMember" xml:lang="en-US">Arrangements and Non-arrangement Transactions [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ArrangementsAndNonarrangementTransactionsMember" xml:lang="en-US">Arrangements and Non-arrangement Transactions [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="lab_us-gaap_ArrangementsAndNonarrangementTransactionsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LicensingAgreementsMember" xlink:label="loc_us-gaap_LicensingAgreementsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LicensingAgreementsMember" xml:lang="en-US">Licensing Agreements [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LicensingAgreementsMember" xml:lang="en-US">Licensing Agreements</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LicensingAgreementsMember" xlink:to="lab_us-gaap_LicensingAgreementsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentIdentifierSchemeAxis" xlink:label="loc_invest_InvestmentIdentifierSchemeAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentIdentifierSchemeAxis" xml:lang="en-US">Investment Identifier Scheme [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentIdentifierSchemeAxis" xml:lang="en-US">Investment Identifier Scheme [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentIdentifierSchemeAxis" xlink:to="lab_invest_InvestmentIdentifierSchemeAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentIdentifierSchemeDomain" xlink:label="loc_invest_InvestmentIdentifierSchemeDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentIdentifierSchemeDomain" xml:lang="en-US">Investment Identifier Scheme [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentIdentifierSchemeDomain" xml:lang="en-US">Investment Identifier Scheme [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentIdentifierSchemeDomain" xlink:to="lab_invest_InvestmentIdentifierSchemeDomain" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_FundTrustsMember" xlink:label="loc_usl_FundTrustsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_FundTrustsMember" xml:lang="en-US">Fund Trusts [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_FundTrustsMember" xml:lang="en-US">USL and the Related Public Funds, other than USCI, USAG, CPER and USMI</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_FundTrustsMember" xml:lang="en-US">Fund Trusts [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_FundTrustsMember" xlink:to="lab_usl_FundTrustsMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_GroupThreeMember" xlink:label="loc_usl_GroupThreeMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_GroupThreeMember" xml:lang="en-US">Group Three [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_GroupThreeMember" xml:lang="en-US">On and after October 20, 2011</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_GroupThreeMember" xml:lang="en-US">Group Three</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_GroupThreeMember" xlink:to="lab_usl_GroupThreeMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_FeesPaidAndRelatedPartyTransactionsLineItems" xlink:label="loc_usl_FeesPaidAndRelatedPartyTransactionsLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_FeesPaidAndRelatedPartyTransactionsLineItems" xml:lang="en-US">Fees Paid And Related Party Transactions [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_FeesPaidAndRelatedPartyTransactionsLineItems" xml:lang="en-US">Fees Paid and Related Party Transactions [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_FeesPaidAndRelatedPartyTransactionsLineItems" xml:lang="en-US">Fees Paid and Related Party Transactions [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_FeesPaidAndRelatedPartyTransactionsLineItems" xlink:to="lab_usl_FeesPaidAndRelatedPartyTransactionsLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ManagementFeeDescription" xlink:label="loc_us-gaap_ManagementFeeDescription" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ManagementFeeDescription" xml:lang="en-US">Management Fee Description</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ManagementFeeDescription" xml:lang="en-US">USCF Management Fee</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ManagementFeeDescription" xlink:to="lab_us-gaap_ManagementFeeDescription" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_RegistrationFeesAndOtherOfferingExpenses" xlink:label="loc_usl_RegistrationFeesAndOtherOfferingExpenses" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_RegistrationFeesAndOtherOfferingExpenses" xml:lang="en-US">Registration Fees And Other Offering Expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_RegistrationFeesAndOtherOfferingExpenses" xml:lang="en-US">Ongoing Registration Fees and Other Offering Expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_RegistrationFeesAndOtherOfferingExpenses" xml:lang="en-US">Registration fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_RegistrationFeesAndOtherOfferingExpenses" xml:lang="en-US">Registration Fees and Other Offering Expenses</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_RegistrationFeesAndOtherOfferingExpenses" xlink:to="lab_usl_RegistrationFeesAndOtherOfferingExpenses" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_BaseFeePercentage" xlink:label="loc_usl_BaseFeePercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_BaseFeePercentage" xml:lang="en-US">Base Fee Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_BaseFeePercentage" xml:lang="en-US">Fee percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_BaseFeePercentage" xml:lang="en-US">Base Fee Percentage</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_BaseFeePercentage" xlink:to="lab_usl_BaseFeePercentage" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LicenseCosts" xlink:label="loc_us-gaap_LicenseCosts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LicenseCosts" xml:lang="en-US">License Costs</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LicenseCosts" xml:lang="en-US">Licensing fee incurred</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LicenseCosts" xml:lang="en-US">License fees</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LicenseCosts" xlink:to="lab_us-gaap_LicenseCosts" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherGeneralExpense" xlink:label="loc_us-gaap_OtherGeneralExpense" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherGeneralExpense" xml:lang="en-US">Other General Expense</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OtherGeneralExpense" xml:lang="en-US">Estimated investor tax reporting cost</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherGeneralExpense" xlink:to="lab_us-gaap_OtherGeneralExpense" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NatureOfExpenseAxis" xlink:label="loc_us-gaap_NatureOfExpenseAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NatureOfExpenseAxis" xml:lang="en-US">Nature Of Expense [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NatureOfExpenseAxis" xml:lang="en-US">Nature of Expense [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NatureOfExpenseAxis" xlink:to="lab_us-gaap_NatureOfExpenseAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterimPeriodCostsNotAllocableDomain" xlink:label="loc_us-gaap_InterimPeriodCostsNotAllocableDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InterimPeriodCostsNotAllocableDomain" xml:lang="en-US">Interim Period Costs Not Allocable [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InterimPeriodCostsNotAllocableDomain" xml:lang="en-US">Interim Period, Costs Not Allocable [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterimPeriodCostsNotAllocableDomain" xlink:to="lab_us-gaap_InterimPeriodCostsNotAllocableDomain" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_RebalancingInvestmentsTransactionMember" xlink:label="loc_usl_RebalancingInvestmentsTransactionMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_RebalancingInvestmentsTransactionMember" xml:lang="en-US">Rebalancing Investments Transaction [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_RebalancingInvestmentsTransactionMember" xml:lang="en-US">Re balancing Investments Transaction</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_RebalancingInvestmentsTransactionMember" xml:lang="en-US">Rebalancing Investments Transaction [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_RebalancingInvestmentsTransactionMember" xlink:to="lab_usl_RebalancingInvestmentsTransactionMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_TradesNecessitatedByCreationAndRedemptionActivityMember" xlink:label="loc_usl_TradesNecessitatedByCreationAndRedemptionActivityMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_TradesNecessitatedByCreationAndRedemptionActivityMember" xml:lang="en-US">Trades Necessitated By Creation And Redemption Activity [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_TradesNecessitatedByCreationAndRedemptionActivityMember" xml:lang="en-US">Trades Necessitated By Creation And Redemption Activity</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_TradesNecessitatedByCreationAndRedemptionActivityMember" xml:lang="en-US">Trades Necessitated By Creation And Redemption Activity [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_TradesNecessitatedByCreationAndRedemptionActivityMember" xlink:to="lab_usl_TradesNecessitatedByCreationAndRedemptionActivityMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xlink:label="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xml:lang="en-US">Long Duration Contracts Assumptions By Product And Guarantee [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xml:lang="en-US">Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xlink:to="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FloorBrokerageExchangeAndClearanceFees" xlink:label="loc_us-gaap_FloorBrokerageExchangeAndClearanceFees" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FloorBrokerageExchangeAndClearanceFees" xml:lang="en-US">Floor Brokerage Exchange And Clearance Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FloorBrokerageExchangeAndClearanceFees" xml:lang="en-US">Brokerage commissions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FloorBrokerageExchangeAndClearanceFees" xml:lang="en-US">Brokerage commissions</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FloorBrokerageExchangeAndClearanceFees" xlink:to="lab_us-gaap_FloorBrokerageExchangeAndClearanceFees" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_PercentageOfAverageDailyNetAssets" xlink:label="loc_usl_PercentageOfAverageDailyNetAssets" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_PercentageOfAverageDailyNetAssets" xml:lang="en-US">Percentage Of Average Daily Net Assets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_PercentageOfAverageDailyNetAssets" xml:lang="en-US">Brokerage commissions as a percentage of average daily net assets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_PercentageOfAverageDailyNetAssets" xml:lang="en-US">Percentage of Average Daily Net Assets</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_PercentageOfAverageDailyNetAssets" xlink:to="lab_usl_PercentageOfAverageDailyNetAssets" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" xlink:label="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" xml:lang="en-US">Long Duration Contracts Assumptions By Product And Guarantee [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" xml:lang="en-US">Long-Duration Contracts, Assumptions, by Product and Guarantee [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" xlink:to="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_MarketingAgreementMember" xlink:label="loc_usl_MarketingAgreementMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_MarketingAgreementMember" xml:lang="en-US">Marketing Agreement [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_MarketingAgreementMember" xml:lang="en-US">Marketing Agreement</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_MarketingAgreementMember" xml:lang="en-US">Marketing Agreement</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_MarketingAgreementMember" xlink:to="lab_usl_MarketingAgreementMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_GroupFourMember" xlink:label="loc_usl_GroupFourMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_GroupFourMember" xml:lang="en-US">Group Four [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_GroupFourMember" xml:lang="en-US">USL&#39;s assets up to $3 billion</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_GroupFourMember" xml:lang="en-US">Group Four</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_GroupFourMember" xlink:to="lab_usl_GroupFourMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_GroupFiveMember" xlink:label="loc_usl_GroupFiveMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_GroupFiveMember" xml:lang="en-US">Group Five [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_GroupFiveMember" xml:lang="en-US">USL&#39;s assets in excess of $3 billion</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_GroupFiveMember" xml:lang="en-US">Group Five</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_GroupFiveMember" xlink:to="lab_usl_GroupFiveMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_GroupSixMember" xlink:label="loc_usl_GroupSixMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_GroupSixMember" xml:lang="en-US">Group Six [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_GroupSixMember" xml:lang="en-US">First $500 million of USL&#39;s, USOF&#39;s, USNG&#39;s, UGA&#39;s, USDHO&#39;s, USSO&#39;s, US12NG&#39;s, USBO&#39;s, USCI&#39;s, CPER&#39;s, USAG&#39;s and USMI&#39;s combined net assets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_GroupSixMember" xml:lang="en-US">Group Six</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_GroupSixMember" xlink:to="lab_usl_GroupSixMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_GroupSevenMember" xlink:label="loc_usl_GroupSevenMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_GroupSevenMember" xml:lang="en-US">Group Seven [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_GroupSevenMember" xml:lang="en-US">USL&#39;s, USOF&#39;s, USNG&#39;s, UGA&#39;s, USDHO&#39;s, USSO&#39;s, US12NG&#39;s, USBO&#39;s, USCI&#39;s, CPER&#39;s, USAG&#39;s and USMI&#39;s combined net assets greater than $500 million but less than $1 billion</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_GroupSevenMember" xml:lang="en-US">Group Seven</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_GroupSevenMember" xlink:to="lab_usl_GroupSevenMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_GroupEightMember" xlink:label="loc_usl_GroupEightMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_GroupEightMember" xml:lang="en-US">Group Eight [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_GroupEightMember" xml:lang="en-US">USL&#39;s, USOF&#39;s, USNG&#39;s, UGA&#39;s, USDHO&#39;s, USSO&#39;s, US12NG&#39;s, USBO&#39;s, USCI&#39;s, CPER&#39;s, USAG&#39;s and USMI&#39;s combined net assets exceed $1 billion</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_GroupEightMember" xml:lang="en-US">Group Eight</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_GroupEightMember" xlink:to="lab_usl_GroupEightMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MaximumMember" xml:lang="en-US">Maximum [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_MaximumMember" xml:lang="en-US">Maximum</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MaximumMember" xlink:to="lab_us-gaap_MaximumMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MinimumMember" xml:lang="en-US">Minimum [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_MinimumMember" xml:lang="en-US">Minimum</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinimumMember" xlink:to="lab_us-gaap_MinimumMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_BasisAmountForFeePercentage" xlink:label="loc_usl_BasisAmountForFeePercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_BasisAmountForFeePercentage" xml:lang="en-US">Basis Amount For Fee Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_BasisAmountForFeePercentage" xml:lang="en-US">Base amount for determining fee percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_BasisAmountForFeePercentage" xml:lang="en-US">Basis Amount for Fee Percentage</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_BasisAmountForFeePercentage" xlink:to="lab_usl_BasisAmountForFeePercentage" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" xlink:label="loc_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" xml:lang="en-US">Noninterest Expense Transfer Agent And Custodian Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" xml:lang="en-US">Annual Fee for transfer agency services</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" xlink:to="lab_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_TransactionFeesPaidPerTransaction" xlink:label="loc_usl_TransactionFeesPaidPerTransaction" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_TransactionFeesPaidPerTransaction" xml:lang="en-US">Transaction Fees Paid Per Transaction</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_TransactionFeesPaidPerTransaction" xml:lang="en-US">Transaction fees per transaction</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_TransactionFeesPaidPerTransaction" xml:lang="en-US">Transaction Fees Paid.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_TransactionFeesPaidPerTransaction" xlink:to="lab_usl_TransactionFeesPaidPerTransaction" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_CommissionsPaid" xlink:label="loc_usl_CommissionsPaid" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_CommissionsPaid" xml:lang="en-US">Commissions Paid</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_CommissionsPaid" xml:lang="en-US">Commissions per round-turn trade, including applicable exchange and NFA fees for Oil Futures Contracts and options on Oil Futures Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_CommissionsPaid" xml:lang="en-US">Commissions Paid</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_CommissionsPaid" xlink:to="lab_usl_CommissionsPaid" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" xlink:label="loc_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" xml:lang="en-US">Carrying Amounts And Fair Values Of Financial Instruments Or Liabilities [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" xml:lang="en-US">Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" xml:lang="en-US">Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" xlink:to="lab_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xlink:label="loc_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xml:lang="en-US">Carrying Amounts And Fair Values Of Financial Instruments Or Liabilities [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xml:lang="en-US">Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xml:lang="en-US">Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xlink:to="lab_usl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DepositsMoneyMarketDeposits" xlink:label="loc_us-gaap_DepositsMoneyMarketDeposits" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DepositsMoneyMarketDeposits" xml:lang="en-US">Deposits Money Market Deposits</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DepositsMoneyMarketDeposits" xml:lang="en-US">Cash investments in money market funds</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositsMoneyMarketDeposits" xlink:to="lab_us-gaap_DepositsMoneyMarketDeposits" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Deposits" xlink:label="loc_us-gaap_Deposits" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Deposits" xml:lang="en-US">Deposits</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_Deposits" xml:lang="en-US">Deposits in domestic and foreign financial institutions</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Deposits" xlink:to="lab_us-gaap_Deposits" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" xlink:label="loc_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" xml:lang="en-US">Average Sales Price And Production Costs Per Unit Of Production [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" xml:lang="en-US">Average Sales Price and Production Costs Per Unit of Production [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" xlink:to="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" xlink:label="loc_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" xml:lang="en-US">Average Sales Price And Production Costs Per Unit Of Production [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" xml:lang="en-US">Average Sales Price and Production Costs Per Unit of Production [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" xlink:to="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xml:lang="en-US">Increase Decrease In Partners Capital [Roll Forward]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xml:lang="en-US">Per Share Operating Performance:</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xlink:to="lab_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_TotalIncomeLossPerUnit" xlink:label="loc_usl_TotalIncomeLossPerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_TotalIncomeLossPerUnit" xml:lang="en-US">Total Income Loss Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_TotalIncomeLossPerUnit" xml:lang="en-US">Total income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_TotalIncomeLossPerUnit" xml:lang="en-US">Total Income (Loss), Per Unit</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_TotalIncomeLossPerUnit" xlink:to="lab_usl_TotalIncomeLossPerUnit" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_TotalExpensesPerUnit" xlink:label="loc_usl_TotalExpensesPerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_TotalExpensesPerUnit" xml:lang="en-US">Total Expenses Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_TotalExpensesPerUnit" xml:lang="en-US">Net expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_TotalExpensesPerUnit" xml:lang="en-US">Total Expenses, Per Unit</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_TotalExpensesPerUnit" xlink:to="lab_usl_TotalExpensesPerUnit" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_IncreaseDecreaseInNetAssetValuePerUnit" xlink:label="loc_usl_IncreaseDecreaseInNetAssetValuePerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_IncreaseDecreaseInNetAssetValuePerUnit" xml:lang="en-US">Increase Decrease In Net Asset Value Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_IncreaseDecreaseInNetAssetValuePerUnit" xml:lang="en-US">Net increase (decrease) in net asset value</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_IncreaseDecreaseInNetAssetValuePerUnit" xml:lang="en-US">Increase (Decrease) In Net Asset Value Per Unit</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_IncreaseDecreaseInNetAssetValuePerUnit" xlink:to="lab_usl_IncreaseDecreaseInNetAssetValuePerUnit" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_RateOfReturnOnAverageAsset" xlink:label="loc_usl_RateOfReturnOnAverageAsset" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_RateOfReturnOnAverageAsset" xml:lang="en-US">Rate Of Return On Average Asset</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_RateOfReturnOnAverageAsset" xml:lang="en-US">Total Return</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_RateOfReturnOnAverageAsset" xml:lang="en-US">Rate Of Return On Average Asset</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_RateOfReturnOnAverageAsset" xlink:to="lab_usl_RateOfReturnOnAverageAsset" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_AverageNetAssetsAbstract" xlink:label="loc_usl_AverageNetAssetsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_AverageNetAssetsAbstract" xml:lang="en-US">Average Net Assets [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_AverageNetAssetsAbstract" xml:lang="en-US">Ratios to Average Net Assets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_AverageNetAssetsAbstract" xml:lang="en-US">Average Net Assets [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_AverageNetAssetsAbstract" xlink:to="lab_usl_AverageNetAssetsAbstract" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_PercentageOfTotalRevenue" xlink:label="loc_usl_PercentageOfTotalRevenue" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_PercentageOfTotalRevenue" xml:lang="en-US">Percentage Of Total Revenue</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_PercentageOfTotalRevenue" xml:lang="en-US">Total income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_PercentageOfTotalRevenue" xml:lang="en-US">Percentage of Total Revenue</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_PercentageOfTotalRevenue" xlink:to="lab_usl_PercentageOfTotalRevenue" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_ManagementIncentiveFeePercentage" xlink:label="loc_usl_ManagementIncentiveFeePercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_ManagementIncentiveFeePercentage" xml:lang="en-US">Management Incentive Fee Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_ManagementIncentiveFeePercentage" xml:lang="en-US">Management fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_ManagementIncentiveFeePercentage" xml:lang="en-US">Management Incentive Fee Percentage</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_ManagementIncentiveFeePercentage" xlink:to="lab_usl_ManagementIncentiveFeePercentage" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_ExpensesExcludingManagementFeePercentage" xlink:label="loc_usl_ExpensesExcludingManagementFeePercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_ExpensesExcludingManagementFeePercentage" xml:lang="en-US">Expenses Excluding Management Fee Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_ExpensesExcludingManagementFeePercentage" xml:lang="en-US">Expenses excluding management fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_ExpensesExcludingManagementFeePercentage" xml:lang="en-US">Expenses, Excluding Management Fee Percentage</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_ExpensesExcludingManagementFeePercentage" xlink:to="lab_usl_ExpensesExcludingManagementFeePercentage" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_PercentageOfConsolidatedNetIncomeLoss" xlink:label="loc_usl_PercentageOfConsolidatedNetIncomeLoss" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_PercentageOfConsolidatedNetIncomeLoss" xml:lang="en-US">Percentage Of Consolidated Net Income Loss</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_PercentageOfConsolidatedNetIncomeLoss" xml:lang="en-US">Net income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_PercentageOfConsolidatedNetIncomeLoss" xml:lang="en-US">Percentage of Consolidated Net Income (Loss).</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_PercentageOfConsolidatedNetIncomeLoss" xlink:to="lab_usl_PercentageOfConsolidatedNetIncomeLoss" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" xml:lang="en-US">Schedule Of Trading Securities And Other Trading Assets [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" xml:lang="en-US">Schedule of Trading Securities and Other Trading Assets [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" xlink:to="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xml:lang="en-US">Fair Value By Fair Value Hierarchy Level [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xml:lang="en-US">Fair Value, Hierarchy</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xml:lang="en-US">Fair Value Measurements Fair Value Hierarchy [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xml:lang="en-US">Fair Value, Measurements, Fair Value Hierarchy [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xml:lang="en-US">Fair Value Inputs Level 1 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xml:lang="en-US">Fair Value, Inputs, Level 1</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member" xlink:to="lab_us-gaap_FairValueInputsLevel1Member" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueInputsLevel2Member" xml:lang="en-US">Fair Value, Inputs, Level 2 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FairValueInputsLevel2Member" xml:lang="en-US">Fair Value, Inputs, Level 2</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel2Member" xlink:to="lab_us-gaap_FairValueInputsLevel2Member" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xml:lang="en-US">Fair Value, Inputs, Level 3</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member" xlink:to="lab_us-gaap_FairValueInputsLevel3Member" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xml:lang="en-US">Derivative Instrument Risk [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xml:lang="en-US">Derivative Instrument Risk</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis" xlink:to="lab_us-gaap_DerivativeInstrumentRiskAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DerivativeContractTypeDomain" xml:lang="en-US">Derivative Contract Type [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DerivativeContractTypeDomain" xml:lang="en-US">Derivative Contract Type [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeContractTypeDomain" xlink:to="lab_us-gaap_DerivativeContractTypeDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="loc_us-gaap_ShortTermInvestmentsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ShortTermInvestmentsMember" xml:lang="en-US">Short Term Investments [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ShortTermInvestmentsMember" xml:lang="en-US">Short-Term Investments</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermInvestmentsMember" xlink:to="lab_us-gaap_ShortTermInvestmentsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xml:lang="en-US">Schedule Of Trading Securities And Other Trading Assets [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xml:lang="en-US">Schedule of Trading Securities and Other Trading Assets [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xlink:to="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xml:lang="en-US">Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xml:lang="en-US">Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:to="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommodityContractMember" xlink:label="loc_us-gaap_CommodityContractMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommodityContractMember" xml:lang="en-US">Commodity Contract [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommodityContractMember" xml:lang="en-US">Commodity Contracts</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommodityContractMember" xlink:to="lab_us-gaap_CommodityContractMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" xml:lang="en-US">Concentration Risk By Benchmark [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" xml:lang="en-US">Concentration Risk Benchmark</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConcentrationRiskBenchmarkDomain" xml:lang="en-US">Concentration Risk Benchmark [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ConcentrationRiskBenchmarkDomain" xml:lang="en-US">Concentration Risk Benchmark [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:to="lab_us-gaap_ConcentrationRiskBenchmarkDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsTotalMember" xlink:label="loc_us-gaap_AssetsTotalMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetsTotalMember" xml:lang="en-US">Assets Total [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AssetsTotalMember" xml:lang="en-US">Assets</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsTotalMember" xlink:to="lab_us-gaap_AssetsTotalMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_StatementScheduleOfInvestmentsAbstract" xlink:label="loc_usl_StatementScheduleOfInvestmentsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_StatementScheduleOfInvestmentsAbstract" xml:lang="en-US">Statement Schedule Of Investments [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_StatementScheduleOfInvestmentsAbstract" xml:lang="en-US">Statement - Schedule of Investments [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_StatementScheduleOfInvestmentsAbstract" xlink:to="lab_usl_StatementScheduleOfInvestmentsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashEquivalentsMember" xlink:label="loc_us-gaap_CashEquivalentsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashEquivalentsMember" xml:lang="en-US">Cash Equivalents [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CashEquivalentsMember" xml:lang="en-US">Cash Equivalents</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashEquivalentsMember" xlink:to="lab_us-gaap_CashEquivalentsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_USTreasurySecuritiesMember" xlink:label="loc_us-gaap_USTreasurySecuritiesMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_USTreasurySecuritiesMember" xml:lang="en-US">U S Treasury Securities [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_USTreasurySecuritiesMember" xml:lang="en-US">US Treasury Securities</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_USTreasurySecuritiesMember" xml:lang="en-US">US Treasury Securities</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USTreasurySecuritiesMember" xlink:to="lab_us-gaap_USTreasurySecuritiesMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MoneyMarketFundsMember" xml:lang="en-US">Money Market Funds [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_MoneyMarketFundsMember" xml:lang="en-US">Money Market Funds</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MoneyMarketFundsMember" xlink:to="lab_us-gaap_MoneyMarketFundsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSecuritiesSeriesAxis" xlink:label="loc_invest_InvestmentSecuritiesSeriesAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentSecuritiesSeriesAxis" xml:lang="en-US">Investment Securities Series [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentSecuritiesSeriesAxis" xml:lang="en-US">Investment Securities Series</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSecuritiesSeriesAxis" xlink:to="lab_invest_InvestmentSecuritiesSeriesAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSecuritiesSeriesDomain" xlink:label="loc_invest_InvestmentSecuritiesSeriesDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentSecuritiesSeriesDomain" xml:lang="en-US">Investment Securities Series [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_invest_InvestmentSecuritiesSeriesDomain" xml:lang="en-US">Investment Securities Series [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSecuritiesSeriesDomain" xlink:to="lab_invest_InvestmentSecuritiesSeriesDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount" xml:lang="en-US">Investment Owned Balance Principal Amount</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount" xml:lang="en-US">Principal Amount</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:to="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xlink:label="loc_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xml:lang="en-US">Investment Owned Underlying Face Amount At Market Value</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xml:lang="en-US">Market Value</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xlink:to="lab_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_PercentageOfPartnersCapital" xlink:label="loc_usl_PercentageOfPartnersCapital" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_PercentageOfPartnersCapital" xml:lang="en-US">Percentage Of Partners Capital</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_PercentageOfPartnersCapital" xml:lang="en-US">% of Partners&#39; Capital</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_PercentageOfPartnersCapital" xml:lang="en-US">Percentage of Partners Capital</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_PercentageOfPartnersCapital" xlink:to="lab_usl_PercentageOfPartnersCapital" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xml:lang="en-US">Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xml:lang="en-US">Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:to="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnInvestmentsByCategoryAxis" xlink:label="loc_us-gaap_GainLossOnInvestmentsByCategoryAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GainLossOnInvestmentsByCategoryAxis" xml:lang="en-US">Investments by Category [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_GainLossOnInvestmentsByCategoryAxis" xml:lang="en-US">Balance Sheet Location</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnInvestmentsByCategoryAxis" xlink:to="lab_us-gaap_GainLossOnInvestmentsByCategoryAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain" xlink:label="loc_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain" xml:lang="en-US">Marketable Securities and Investments Held at Cost [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain" xml:lang="en-US">Balance Sheet Location [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain" xlink:to="lab_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_ClosedPositionsMember" xlink:label="loc_usl_ClosedPositionsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_ClosedPositionsMember" xml:lang="en-US">Closed Positions [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_ClosedPositionsMember" xml:lang="en-US">Realized gain (loss) on closed positions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_ClosedPositionsMember" xml:lang="en-US">Closed Positions [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_ClosedPositionsMember" xlink:to="lab_usl_ClosedPositionsMember" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_OpenPositionMember" xlink:label="loc_usl_OpenPositionMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_OpenPositionMember" xml:lang="en-US">Open Position [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_OpenPositionMember" xml:lang="en-US">Change in unrealized gain (loss) on open positions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_OpenPositionMember" xml:lang="en-US">Open Position [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_OpenPositionMember" xlink:to="lab_usl_OpenPositionMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossLineItems" xml:lang="en-US">Derivative Instruments Gain Loss [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossLineItems" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="lab_us-gaap_DerivativeInstrumentsGainLossLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="loc_us-gaap_GainLossOnSaleOfDerivatives" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GainLossOnSaleOfDerivatives" xml:lang="en-US">Gain (Loss) on Sale of Derivatives</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_GainLossOnSaleOfDerivatives" xml:lang="en-US">Realized Gain (Loss) on Derivatives Recognized in Income</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfDerivatives" xlink:to="lab_us-gaap_GainLossOnSaleOfDerivatives" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xml:lang="en-US">Unrealized Gain Loss On Derivatives And Commodity Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xml:lang="en-US">Change in Unrealized Gain (Loss) on Derivatives Recognized in Income</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xml:lang="en-US">Unrealized (gain) loss on open futures contracts</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xlink:to="lab_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xml:lang="en-US">Debt Instrument Interest Rate Stated Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xml:lang="en-US">Interest rate</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xlink:label="loc_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xml:lang="en-US">Investment Owned Subject To Option Exercise Dates</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xml:lang="en-US">Expiration date</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xlink:to="lab_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_CollateralAmountOnOpenFuturesContracts" xlink:label="loc_usl_CollateralAmountOnOpenFuturesContracts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_CollateralAmountOnOpenFuturesContracts" xml:lang="en-US">Collateral Amount On Open Futures Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_CollateralAmountOnOpenFuturesContracts" xml:lang="en-US">The collateral amount on open future contracts.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_CollateralAmountOnOpenFuturesContracts" xlink:to="lab_usl_CollateralAmountOnOpenFuturesContracts" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeStatementAbstract" xml:lang="en-US">Income Statement [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="lab_us-gaap_IncomeStatementAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RevenuesAbstract" xml:lang="en-US">Revenues [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RevenuesAbstract" xml:lang="en-US">Income</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenuesAbstract" xlink:to="lab_us-gaap_RevenuesAbstract" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_GainLossOnCommodityFuturesAbstract" xlink:label="loc_usl_GainLossOnCommodityFuturesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_GainLossOnCommodityFuturesAbstract" xml:lang="en-US">Gain Loss On Commodity Futures [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_GainLossOnCommodityFuturesAbstract" xml:lang="en-US">Gain (loss) on trading of commodity futures contracts:</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_GainLossOnCommodityFuturesAbstract" xml:lang="en-US">Gain (Loss) On Commodity Futures [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_GainLossOnCommodityFuturesAbstract" xlink:to="lab_usl_GainLossOnCommodityFuturesAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnSaleOfInvestments" xlink:label="loc_us-gaap_GainLossOnSaleOfInvestments" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xml:lang="en-US">Gain Loss On Sale Of Investments</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xml:lang="en-US">Realized gain (loss) on closed futures contracts</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfInvestments" xlink:to="lab_us-gaap_GainLossOnSaleOfInvestments" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_UnrealizedGainLossOnInvestments" xml:lang="en-US">Unrealized Gain Loss On Investments</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_UnrealizedGainLossOnInvestments" xml:lang="en-US">Change in unrealized gain (loss) on open futures contracts</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnInvestments" xlink:to="lab_us-gaap_UnrealizedGainLossOnInvestments" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendIncomeOperating" xlink:label="loc_us-gaap_DividendIncomeOperating" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DividendIncomeOperating" xml:lang="en-US">Dividend Income Operating</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DividendIncomeOperating" xml:lang="en-US">Dividend income</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendIncomeOperating" xlink:to="lab_us-gaap_DividendIncomeOperating" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestIncomeOperating" xlink:label="loc_us-gaap_InterestIncomeOperating" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InterestIncomeOperating" xml:lang="en-US">Interest Income Operating</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InterestIncomeOperating" xml:lang="en-US">Interest income</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeOperating" xlink:to="lab_us-gaap_InterestIncomeOperating" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherIncome" xlink:label="loc_us-gaap_OtherIncome" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherIncome" xml:lang="en-US">Other Income</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OtherIncome" xml:lang="en-US">ETF transaction fees</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherIncome" xlink:to="lab_us-gaap_OtherIncome" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Revenues" xml:lang="en-US">Revenues</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_Revenues" xml:lang="en-US">Total income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_Revenues" xml:lang="en-US">Total Income (Loss)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues" xlink:to="lab_us-gaap_Revenues" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingExpensesAbstract" xml:lang="en-US">Operating Expenses [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OperatingExpensesAbstract" xml:lang="en-US">Expenses</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingExpensesAbstract" xlink:to="lab_us-gaap_OperatingExpensesAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetManagementCosts" xlink:label="loc_us-gaap_AssetManagementCosts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetManagementCosts" xml:lang="en-US">Asset Management Costs</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AssetManagementCosts" xml:lang="en-US">General Partner management fees (Note 3)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetManagementCosts" xlink:to="lab_us-gaap_AssetManagementCosts" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProfessionalFees" xlink:label="loc_us-gaap_ProfessionalFees" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProfessionalFees" xml:lang="en-US">Professional Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ProfessionalFees" xml:lang="en-US">Professional fees</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfessionalFees" xlink:to="lab_us-gaap_ProfessionalFees" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoninterestExpenseDirectorsFees" xlink:label="loc_us-gaap_NoninterestExpenseDirectorsFees" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NoninterestExpenseDirectorsFees" xml:lang="en-US">Noninterest Expense Directors Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NoninterestExpenseDirectorsFees" xml:lang="en-US">Directors&#39; fees and insurance</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/presentationGuidance" xlink:label="lab_us-gaap_NoninterestExpenseDirectorsFees" xml:lang="en-US">Estimated directors&#39; fees and expenses</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpenseDirectorsFees" xlink:to="lab_us-gaap_NoninterestExpenseDirectorsFees" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetIncomeLoss" xml:lang="en-US">Net Income Loss</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetIncomeLoss" xml:lang="en-US">Net income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NetIncomeLoss" xml:lang="en-US">Net income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetIncomeLoss" xml:lang="en-US">Net income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/disclosureGuidance" xlink:label="lab_us-gaap_NetIncomeLoss" xml:lang="en-US">Net Income (Loss)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss" xlink:to="lab_us-gaap_NetIncomeLoss" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xlink:label="loc_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xml:lang="en-US">Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xml:lang="en-US">Net income (loss) per limited partnership share</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xml:lang="en-US">Net Income (Loss) per Share</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xlink:to="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xlink:label="loc_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xml:lang="en-US">Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xml:lang="en-US">Net income (loss) per weighted average limited partnership share</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xlink:to="lab_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xlink:label="loc_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xml:lang="en-US">Weighted Average Limited Partnership Units Outstanding</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xml:lang="en-US">Weighted average limited partnership shares outstanding</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xlink:to="lab_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfPartnersCapitalAbstract" xlink:label="loc_us-gaap_StatementOfPartnersCapitalAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementOfPartnersCapitalAbstract" xml:lang="en-US">Statement Of Partners Capital [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfPartnersCapitalAbstract" xlink:to="lab_us-gaap_StatementOfPartnersCapitalAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnerCapitalComponentsAxis" xlink:label="loc_us-gaap_PartnerCapitalComponentsAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnerCapitalComponentsAxis" xml:lang="en-US">Partner Capital Components [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnerCapitalComponentsAxis" xml:lang="en-US">Partner Capital Components [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnerCapitalComponentsAxis" xlink:to="lab_us-gaap_PartnerCapitalComponentsAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnerCapitalComponentsDomain" xlink:label="loc_us-gaap_PartnerCapitalComponentsDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnerCapitalComponentsDomain" xml:lang="en-US">Partner Capital Components [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnerCapitalComponentsDomain" xml:lang="en-US">Partner Capital Components [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnerCapitalComponentsDomain" xlink:to="lab_us-gaap_PartnerCapitalComponentsDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeneralPartnerMember" xlink:label="loc_us-gaap_GeneralPartnerMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GeneralPartnerMember" xml:lang="en-US">General Partner [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_GeneralPartnerMember" xml:lang="en-US">General Partner</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralPartnerMember" xlink:to="lab_us-gaap_GeneralPartnerMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LimitedPartnerMember" xlink:label="loc_us-gaap_LimitedPartnerMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LimitedPartnerMember" xml:lang="en-US">Limited Partner [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LimitedPartnerMember" xml:lang="en-US">Limited Partners</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LimitedPartnerMember" xlink:to="lab_us-gaap_LimitedPartnerMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAccountContributions" xlink:label="loc_us-gaap_PartnersCapitalAccountContributions" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAccountContributions" xml:lang="en-US">Partners&#39; Capital Account, Contributions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnersCapitalAccountContributions" xml:lang="en-US">Addition of partnership shares</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAccountContributions" xlink:to="lab_us-gaap_PartnersCapitalAccountContributions" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAccountRedemptions" xlink:label="loc_us-gaap_PartnersCapitalAccountRedemptions" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAccountRedemptions" xml:lang="en-US">Partners Capital Account Redemptions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PartnersCapitalAccountRedemptions" xml:lang="en-US">Redemption of partnership shares</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAccountRedemptions" xlink:to="lab_us-gaap_PartnersCapitalAccountRedemptions" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAccountUnitsContributed" xlink:label="loc_us-gaap_PartnersCapitalAccountUnitsContributed" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAccountUnitsContributed" xml:lang="en-US">Partners&#39; Capital Account, Units, Contributed</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PartnersCapitalAccountUnitsContributed" xml:lang="en-US">Addition of partnership unit shares</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAccountUnitsContributed" xlink:to="lab_us-gaap_PartnersCapitalAccountUnitsContributed" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract" xml:lang="en-US">Statement Of Cash Flows [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xml:lang="en-US">Cash Flows from Operating Activities:</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xml:lang="en-US">Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xml:lang="en-US">Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" xlink:label="loc_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" xml:lang="en-US">Increase Decrease In Financial Instruments Used In Operating Activities</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" xml:lang="en-US">(Increase) decrease in commodity futures trading account - cash and cash equivalents</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" xlink:to="lab_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInDividendsReceivable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInDividendsReceivable" xml:lang="en-US">Increase Decrease In Dividends Receivable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInDividendsReceivable" xml:lang="en-US">(Increase) decrease in dividends receivable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:to="lab_us-gaap_IncreaseDecreaseInDividendsReceivable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xml:lang="en-US">Increase (Decrease) in Accounts and Other Receivables</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xml:lang="en-US">(Increase) decrease in ETF transaction fees receivable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" xlink:label="loc_us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" xml:lang="en-US">Increase (Decrease) in Payables to Broker-Dealers and Clearing Organizations</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" xml:lang="en-US">Increase (decrease) in payable due to Broker</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" xlink:to="lab_us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities, Continuing Operations</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xml:lang="en-US">Net cash provided by (used in) operating activities</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xml:lang="en-US">Cash Flows from Financing Activities:</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromPartnershipContribution" xlink:label="loc_us-gaap_ProceedsFromPartnershipContribution" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProceedsFromPartnershipContribution" xml:lang="en-US">Proceeds From Partnership Contribution</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ProceedsFromPartnershipContribution" xml:lang="en-US">Addition of partnership shares</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromPartnershipContribution" xlink:to="lab_us-gaap_ProceedsFromPartnershipContribution" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_PaymentsToPartnershipRedemption" xlink:label="loc_usl_PaymentsToPartnershipRedemption" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_PaymentsToPartnershipRedemption" xml:lang="en-US">Payments To Partnership Redemption</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_usl_PaymentsToPartnershipRedemption" xml:lang="en-US">Redemption of partnership shares</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_PaymentsToPartnershipRedemption" xml:lang="en-US">Payments To Partnership Redemption</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_PaymentsToPartnershipRedemption" xlink:to="lab_usl_PaymentsToPartnershipRedemption" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities, Continuing Operations</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xml:lang="en-US">Net cash provided by (used in) financing activities</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xml:lang="en-US">Cash And Cash Equivalents Period Increase Decrease</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xml:lang="en-US">Net Increase (Decrease) in Cash and Cash Equivalents</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xml:lang="en-US">Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xml:lang="en-US">Organization and Business</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:to="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Liabilities" xml:lang="en-US">Liabilities, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_Liabilities" xml:lang="en-US">Total liabilities</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities" xlink:to="lab_us-gaap_Liabilities" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_DescriptionOfNewAccountingPronouncementsAbstract" xlink:label="loc_usl_DescriptionOfNewAccountingPronouncementsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_DescriptionOfNewAccountingPronouncementsAbstract" xml:lang="en-US">Description Of New Accounting Pronouncements [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_DescriptionOfNewAccountingPronouncementsAbstract" xml:lang="en-US">Description Of New Accounting Pronouncements [Text Block]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_DescriptionOfNewAccountingPronouncementsAbstract" xlink:to="lab_usl_DescriptionOfNewAccountingPronouncementsAbstract" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_DescriptionofnewaccountingpronouncementsTextBlock" xlink:label="loc_usl_DescriptionofnewaccountingpronouncementsTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_DescriptionofnewaccountingpronouncementsTextBlock" xml:lang="en-US">DescriptionOfNewAccountingPronouncements [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_DescriptionofnewaccountingpronouncementsTextBlock" xml:lang="en-US">Recent Accounting Pronouncements</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_DescriptionofnewaccountingpronouncementsTextBlock" xml:lang="en-US">Description Of New Accounting Pronouncements [Text Block]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_DescriptionofnewaccountingpronouncementsTextBlock" xlink:to="lab_usl_DescriptionofnewaccountingpronouncementsTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xml:lang="en-US">Quarterly Financial Information Disclosure [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="lab_us-gaap_QuarterlyFinancialInformationDisclosureAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="loc_us-gaap_QuarterlyFinancialInformationTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_QuarterlyFinancialInformationTextBlock" xml:lang="en-US">Quarterly Financial Information [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_QuarterlyFinancialInformationTextBlock" xml:lang="en-US">Quarterly Financial Data (Unaudited)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_QuarterlyFinancialInformationTextBlock" xlink:to="lab_us-gaap_QuarterlyFinancialInformationTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xml:lang="en-US">Schedule of Quarterly Financial Information [Table Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xml:lang="en-US">Summary of Quarterly Financial Information</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ClassOfStockDomain" xml:lang="en-US">Class of Stock [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfStockDomain" xlink:to="lab_us-gaap_ClassOfStockDomain" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_QuarterlyFinancialInformationLineItems" xlink:label="loc_usl_QuarterlyFinancialInformationLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_QuarterlyFinancialInformationLineItems" xml:lang="en-US">Quarterly Financial Information [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_QuarterlyFinancialInformationLineItems" xlink:to="lab_usl_QuarterlyFinancialInformationLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingExpenses" xml:lang="en-US">Operating Expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_OperatingExpenses" xml:lang="en-US">Total Expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_OperatingExpenses" xml:lang="en-US">Total expenses</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingExpenses" xlink:to="lab_us-gaap_OperatingExpenses" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_IncreaseDecreaseManagementFeesPayable" xlink:label="loc_usl_IncreaseDecreaseManagementFeesPayable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_IncreaseDecreaseManagementFeesPayable" xml:lang="en-US">Increase Decrease Management Fees Payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_IncreaseDecreaseManagementFeesPayable" xml:lang="en-US">Increase (decrease) in General Partner management fees payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_IncreaseDecreaseManagementFeesPayable" xml:lang="en-US">Increase (Decrease) Management Fees Payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_IncreaseDecreaseManagementFeesPayable" xlink:to="lab_usl_IncreaseDecreaseManagementFeesPayable" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_IncreaseDecreaseInProfessionalFeesPayable" xlink:label="loc_usl_IncreaseDecreaseInProfessionalFeesPayable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_IncreaseDecreaseInProfessionalFeesPayable" xml:lang="en-US">Increase Decrease In Professional Fees Payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_IncreaseDecreaseInProfessionalFeesPayable" xml:lang="en-US">Increase (decrease) in professional fees payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_IncreaseDecreaseInProfessionalFeesPayable" xml:lang="en-US">Increase (Decrease) In Professional Fees Payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_IncreaseDecreaseInProfessionalFeesPayable" xlink:to="lab_usl_IncreaseDecreaseInProfessionalFeesPayable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAccountUnitsRedeemed" xlink:label="loc_us-gaap_PartnersCapitalAccountUnitsRedeemed" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAccountUnitsRedeemed" xml:lang="en-US">Partners Capital Account Units Redeemed</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnersCapitalAccountUnitsRedeemed" xml:lang="en-US">Redemption of partnership unit shares</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAccountUnitsRedeemed" xlink:to="lab_us-gaap_PartnersCapitalAccountUnitsRedeemed" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_IncreaseDecreaseInBrokerageCommissionsPayable" xlink:label="loc_usl_IncreaseDecreaseInBrokerageCommissionsPayable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_IncreaseDecreaseInBrokerageCommissionsPayable" xml:lang="en-US">Increase Decrease In Brokerage Commissions Payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_IncreaseDecreaseInBrokerageCommissionsPayable" xml:lang="en-US">Increase (decrease) in brokerage commissions payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_IncreaseDecreaseInBrokerageCommissionsPayable" xml:lang="en-US">The increase (decrease) during the reporting period in the aggregate amount of obligations incurred arising from transactions with broker-dealers, such as amounts due on margin and unsettled cash transactions; includes payables to brokers and dealers.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_IncreaseDecreaseInBrokerageCommissionsPayable" xlink:to="lab_usl_IncreaseDecreaseInBrokerageCommissionsPayable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xml:lang="en-US">Commitments And Contingencies</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xml:lang="en-US">Commitments and Contingencies (Notes 3, 4 and 5)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies" xlink:to="lab_us-gaap_CommitmentsAndContingencies" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAbstract" xlink:label="loc_us-gaap_PartnersCapitalAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAbstract" xml:lang="en-US">Partners Capital [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnersCapitalAbstract" xml:lang="en-US">Partners&#39; Capital</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAbstract" xlink:to="lab_us-gaap_PartnersCapitalAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsReceivable" xlink:label="loc_us-gaap_DividendsReceivable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DividendsReceivable" xml:lang="en-US">Dividends Receivable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DividendsReceivable" xml:lang="en-US">Dividends receivable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsReceivable" xlink:to="lab_us-gaap_DividendsReceivable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Assets" xml:lang="en-US">Assets, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_Assets" xml:lang="en-US">Total assets</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets" xlink:to="lab_us-gaap_Assets" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_NetAssetValuePerUnitAbstract" xlink:label="loc_usl_NetAssetValuePerUnitAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_NetAssetValuePerUnitAbstract" xml:lang="en-US">Net Asset Value Per Unit [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_NetAssetValuePerUnitAbstract" xml:lang="en-US">Net Asset Value Per Share:</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_NetAssetValuePerUnitAbstract" xml:lang="en-US">Net Asset Value, per unit [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_NetAssetValuePerUnitAbstract" xlink:to="lab_usl_NetAssetValuePerUnitAbstract" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0341052017Member" xlink:label="loc_usl_UsTreasuryBills0341052017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0341052017Member" xml:lang="en-US">U.S. Treasury Bills 0.34, 1052017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0341052017Member" xml:lang="en-US">U.S.Treasury Bills 0.34%, 1/05/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0341052017Member" xml:lang="en-US">U.S.Treasury Bills 0.32%, 7/07/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0341052017Member" xlink:to="lab_usl_UsTreasuryBills0341052017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0431192017Member" xlink:label="loc_usl_UsTreasuryBills0431192017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0431192017Member" xml:lang="en-US">U.S. Treasury Bills 0.43, 1192017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0431192017Member" xml:lang="en-US">U.S.Treasury Bills 0.43%, 1/19/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0431192017Member" xml:lang="en-US">U.S.Treasury Bills 0.38%, 7/21/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0431192017Member" xlink:to="lab_usl_UsTreasuryBills0431192017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0361262017Member" xlink:label="loc_usl_UsTreasuryBills0361262017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0361262017Member" xml:lang="en-US">U.S. Treasury Bills 0.36, 1262017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0361262017Member" xml:lang="en-US">U.S.Treasury Bills 0.36%, 1/26/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0361262017Member" xml:lang="en-US">U.S.Treasury Bills 0.39%, 7/28/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0361262017Member" xlink:to="lab_usl_UsTreasuryBills0361262017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0402022017Member" xlink:label="loc_usl_UsTreasuryBills0402022017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0402022017Member" xml:lang="en-US">U.S. Treasury Bills 0.40, 2022017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0402022017Member" xml:lang="en-US">U.S.Treasury Bills 0.40%, 2/02/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0402022017Member" xml:lang="en-US">U.S.Treasury Bills 0.42%, 8/04/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0402022017Member" xlink:to="lab_usl_UsTreasuryBills0402022017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0422092017Member" xlink:label="loc_usl_UsTreasuryBills0422092017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0422092017Member" xml:lang="en-US">U.S. Treasury Bills 0.42, 2092017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0422092017Member" xml:lang="en-US">U.S.Treasury Bills 0.42%, 2/09/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0422092017Member" xml:lang="en-US">U.S.Treasury Bills 0.41%, 8/11/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0422092017Member" xlink:to="lab_usl_UsTreasuryBills0422092017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0452162017Member" xlink:label="loc_usl_UsTreasuryBills0452162017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0452162017Member" xml:lang="en-US">U.S. Treasury Bills 0.45, 2162017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0452162017Member" xml:lang="en-US">U.S.Treasury Bills 0.45%, 2/16/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0452162017Member" xml:lang="en-US">U.S.Treasury Bills 0.43%, 8/18/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0452162017Member" xlink:to="lab_usl_UsTreasuryBills0452162017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0452232017Member" xlink:label="loc_usl_UsTreasuryBills0452232017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0452232017Member" xml:lang="en-US">U.S. Treasury Bills 0.45, 2232017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0452232017Member" xml:lang="en-US">U.S.Treasury Bills 0.45%, 2/23/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0452232017Member" xml:lang="en-US">U.S.Treasury Bills 0.45%, 8/25/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0452232017Member" xlink:to="lab_usl_UsTreasuryBills0452232017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0453022017Member" xlink:label="loc_usl_UsTreasuryBills0453022017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0453022017Member" xml:lang="en-US">U.S. Treasury Bills 0.45, 3022017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0453022017Member" xml:lang="en-US">U.S.Treasury Bills 0.45%, 3/02/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0453022017Member" xml:lang="en-US">U.S.Treasury Bills 0.48%, 9/01/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0453022017Member" xlink:to="lab_usl_UsTreasuryBills0453022017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0473092017Member" xlink:label="loc_usl_UsTreasuryBills0473092017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0473092017Member" xml:lang="en-US">U.S. Treasury Bills 0.47, 3092017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0473092017Member" xml:lang="en-US">U.S.Treasury Bills 0.47%, 3/09/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0473092017Member" xml:lang="en-US">U.S.Treasury Bills 0.46%, 9/08/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0473092017Member" xlink:to="lab_usl_UsTreasuryBills0473092017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0503162017Member" xlink:label="loc_usl_UsTreasuryBills0503162017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0503162017Member" xml:lang="en-US">U.S. Treasury Bills 0.50, 3162017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0503162017Member" xml:lang="en-US">U.S.Treasury Bills 0.50%, 3/16/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0503162017Member" xml:lang="en-US">U.S.Treasury Bills 0.45%, 9/15/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0503162017Member" xlink:to="lab_usl_UsTreasuryBills0503162017Member" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders" xlink:label="loc_us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders" xml:lang="en-US">Increase (Decrease) in Due to Officers and Stockholders</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders" xml:lang="en-US">Increase (decrease) in directors&#39; fees and insurance payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders" xlink:to="lab_us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_OtherOperatingIncomeExpensePolicyTextBlock" xlink:label="loc_usl_OtherOperatingIncomeExpensePolicyTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_OtherOperatingIncomeExpensePolicyTextBlock" xml:lang="en-US">Other Operating Income Expense Policy [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_OtherOperatingIncomeExpensePolicyTextBlock" xml:lang="en-US">Offering Costs</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_usl_OtherOperatingIncomeExpensePolicyTextBlock" xml:lang="en-US">Other Operating Income (Expense), Policy [Text Block]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_OtherOperatingIncomeExpensePolicyTextBlock" xlink:to="lab_usl_OtherOperatingIncomeExpensePolicyTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xml:lang="en-US">Cash And Cash Equivalents Policy [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xml:lang="en-US">Cash Equivalents</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:label="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription" xml:lang="en-US">Reclassification, Policy [Policy Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription" xml:lang="en-US">Reclassification</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:to="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_UseOfEstimates" xml:lang="en-US">Use of Estimates, Policy [Policy Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_UseOfEstimates" xml:lang="en-US">Use of Estimates</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UseOfEstimates" xlink:to="lab_us-gaap_UseOfEstimates" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0453232017Member" xlink:label="loc_usl_UsTreasuryBills0453232017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0453232017Member" xml:lang="en-US">U.S. Treasury Bills 0.45, 3232017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0453232017Member" xml:lang="en-US">U.S.Treasury Bills 0.45%, 3/23/2017</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0453232017Member" xlink:to="lab_usl_UsTreasuryBills0453232017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0433302017Member" xlink:label="loc_usl_UsTreasuryBills0433302017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0433302017Member" xml:lang="en-US">U.S. Treasury Bills 0.43, 3302017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0433302017Member" xml:lang="en-US">U.S.Treasury Bills 0.43%, 3/30/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0433302017Member" xml:lang="en-US">U.S.Treasury Bills 0.38%, 9/29/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0433302017Member" xlink:to="lab_usl_UsTreasuryBills0433302017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0464062017Member" xlink:label="loc_usl_UsTreasuryBills0464062017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0464062017Member" xml:lang="en-US">U.S. Treasury Bills 0.46, 4062017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0464062017Member" xml:lang="en-US">U.S.Treasury Bills 0.46%, 4/06/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0464062017Member" xml:lang="en-US">U.S.Treasury Bills 0.13%, 1/21/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0464062017Member" xlink:to="lab_usl_UsTreasuryBills0464062017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0474132017Member" xlink:label="loc_usl_UsTreasuryBills0474132017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0474132017Member" xml:lang="en-US">U.S. Treasury Bills 0.47, 4132017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0474132017Member" xml:lang="en-US">U.S.Treasury Bills 0.47%, 4/13/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0474132017Member" xml:lang="en-US">U.S.Treasury Bills 0.15%, 1/28/2016</label>

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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0464202017Member" xml:lang="en-US">U.S.Treasury Bills 0.19%, 2/04/2016</label>

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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0555112017Member" xml:lang="en-US">U.S.Treasury Bills 0.55%, 5/11/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0555112017Member" xml:lang="en-US">U.S.Treasury Bills 0.20%, 2/25/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0555112017Member" xlink:to="lab_usl_UsTreasuryBills0555112017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0605182017Member" xlink:label="loc_usl_UsTreasuryBills0605182017Member" />

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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0605182017Member" xml:lang="en-US">U.S.Treasury Bills 0.60%, 5/18/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0605182017Member" xml:lang="en-US">U.S.Treasury Bills 0.23%, 3/03/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0605182017Member" xlink:to="lab_usl_UsTreasuryBills0605182017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0615252017Member" xlink:label="loc_usl_UsTreasuryBills0615252017Member" />

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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0615252017Member" xml:lang="en-US">U.S.Treasury Bills 0.61%, 5/25/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0615252017Member" xml:lang="en-US">U.S.Treasury Bills 0.26%, 3/10/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0615252017Member" xlink:to="lab_usl_UsTreasuryBills0615252017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0606012017Member" xlink:label="loc_usl_UsTreasuryBills0606012017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0606012017Member" xml:lang="en-US">U.S. Treasury Bills 0.60, 6012017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0606012017Member" xml:lang="en-US">U.S.Treasury Bills 0.24%, 3/17/2016</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0606012017Member" xml:lang="en-US">U.S.Treasury Bills 0.60%, 6/01/2017</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0606012017Member" xlink:to="lab_usl_UsTreasuryBills0606012017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0626082017Member" xlink:label="loc_usl_UsTreasuryBills0626082017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0626082017Member" xml:lang="en-US">U.S. Treasury Bills 0.62, 6082017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0626082017Member" xml:lang="en-US">U.S.Treasury Bills 0.62%, 6/08/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0626082017Member" xml:lang="en-US">U.S.Treasury Bills 0.09%, 3/24/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0626082017Member" xlink:to="lab_usl_UsTreasuryBills0626082017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0656152017Member" xlink:label="loc_usl_UsTreasuryBills0656152017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0656152017Member" xml:lang="en-US">U.S. Treasury Bills 0.65, 6152017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0656152017Member" xml:lang="en-US">U.S.Treasury Bills 0.65%, 6/15/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0656152017Member" xml:lang="en-US">U.S.Treasury Bills 0.07%, 3/31/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0656152017Member" xlink:to="lab_usl_UsTreasuryBills0656152017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0646222017Member" xlink:label="loc_usl_UsTreasuryBills0646222017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0646222017Member" xml:lang="en-US">U.S. Treasury Bills 0.64, 6222017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0646222017Member" xml:lang="en-US">U.S.Treasury Bills 0.64%, 6/22/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0646222017Member" xml:lang="en-US">U.S.Treasury Bills 0.07%, 4/07/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0646222017Member" xlink:to="lab_usl_UsTreasuryBills0646222017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0606292017Member" xlink:label="loc_usl_UsTreasuryBills0606292017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0606292017Member" xml:lang="en-US">U.S. Treasury Bills 0.60, 6292017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0606292017Member" xml:lang="en-US">U.S.Treasury Bills 0.60%, 6/29/2017</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0606292017Member" xml:lang="en-US">U.S.Treasury Bills 0.07%, 4/14/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0606292017Member" xlink:to="lab_usl_UsTreasuryBills0606292017Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0131212016Member" xlink:label="loc_usl_UsTreasuryBills0131212016Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0131212016Member" xml:lang="en-US">U.S. Treasury Bills 0.13, 1212016 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0131212016Member" xml:lang="en-US">U.S.Treasury Bills 0.13%, 1/21/2016</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0131212016Member" xml:lang="en-US">U.S.Treasury Bills 0.11%, 4/21/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0131212016Member" xlink:to="lab_usl_UsTreasuryBills0131212016Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0151282016Member" xlink:label="loc_usl_UsTreasuryBills0151282016Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0151282016Member" xml:lang="en-US">U.S. Treasury Bills 0.15, 1282016 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0151282016Member" xml:lang="en-US">U.S.Treasury Bills 0.15%, 1/28/2016</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0151282016Member" xml:lang="en-US">U.S.Treasury Bills 0.21%, 4/28/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0151282016Member" xlink:to="lab_usl_UsTreasuryBills0151282016Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0192042016Member" xlink:label="loc_usl_UsTreasuryBills0192042016Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0192042016Member" xml:lang="en-US">U.S. Treasury Bills 0.19, 2042016 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0192042016Member" xml:lang="en-US">U.S.Treasury Bills 0.19%, 2/04/2016</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0192042016Member" xml:lang="en-US">U.S.Treasury Bills 0.26%, 5/05/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0192042016Member" xlink:to="lab_usl_UsTreasuryBills0192042016Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0222112016Member" xlink:label="loc_usl_UsTreasuryBills0222112016Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0222112016Member" xml:lang="en-US">U.S. Treasury Bills 0.22, 2112016 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0222112016Member" xml:lang="en-US">U.S.Treasury Bills 0.22%, 2/11/2016</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0222112016Member" xml:lang="en-US">U.S.Treasury Bills 0.33%, 5/12/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0222112016Member" xlink:to="lab_usl_UsTreasuryBills0222112016Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0202182016Member" xlink:label="loc_usl_UsTreasuryBills0202182016Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0202182016Member" xml:lang="en-US">U.S. Treasury Bills 0.20, 2182016 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0202182016Member" xml:lang="en-US">U.S.Treasury Bills 0.20%, 2/18/2016</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0202182016Member" xml:lang="en-US">U.S.Treasury Bills 0.31%, 5/19/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0202182016Member" xlink:to="lab_usl_UsTreasuryBills0202182016Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0202252016Member" xlink:label="loc_usl_UsTreasuryBills0202252016Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0202252016Member" xml:lang="en-US">U.S. Treasury Bills 0.20, 2252016 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0202252016Member" xml:lang="en-US">U.S.Treasury Bills 0.20%, 2/25/2016</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0202252016Member" xml:lang="en-US">U.S.Treasury Bills 0.35%, 5/26/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0202252016Member" xlink:to="lab_usl_UsTreasuryBills0202252016Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0233032016Member" xlink:label="loc_usl_UsTreasuryBills0233032016Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0233032016Member" xml:lang="en-US">Us Treasury Bills 0.23, 3032016 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0233032016Member" xml:lang="en-US">U.S.Treasury Bills 0.23%, 3/03/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0233032016Member" xlink:to="lab_usl_UsTreasuryBills0233032016Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_UsTreasuryBills0263102016Member" xlink:label="loc_usl_UsTreasuryBills0263102016Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_UsTreasuryBills0263102016Member" xml:lang="en-US">U.S. Treasury Bills 0.26, 3102016 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_UsTreasuryBills0263102016Member" xml:lang="en-US">U.S.Treasury Bills 0.26%, 3/10/2016</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_UsTreasuryBills0263102016Member" xml:lang="en-US">U.S.Treasury Bills 0.43%, 6/02/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_usl_UsTreasuryBills0263102016Member" xlink:to="lab_usl_UsTreasuryBills0263102016Member" />

    <loc xlink:type="locator" xlink:href="usl-20161231.xsd#usl_NymexWtiCrudeOilFuturesClFebruary2017ContractsExpiringJanuary2017Member" xlink:label="loc_usl_NymexWtiCrudeOilFuturesClFebruary2017ContractsExpiringJanuary2017Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_usl_NymexWtiCrudeOilFuturesClFebruary2017ContractsExpiringJanuary2017Member" xml:lang="en-US">NYMEX WTI Crude Oil Futures CL February 2017 contracts, expiring January 2017 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_usl_NymexWtiCrudeOilFuturesClFebruary2017ContractsExpiringJanuary2017Member" xml:lang="en-US">NYMEX WTI Crude Oil Futures CL July 2014 contracts, expiring June 2014</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_usl_NymexWtiCrudeOilFuturesClFebruary2017ContractsExpiringJanuary2017Member" xml:lang="en-US">NYMEX WTI Crude Oil Futures CL February 2017 contracts, expiring January 2017</label>

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