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    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US">Restricted Cash and Cash Equivalents, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US">Cash and cash equivalents (at cost $56,558,205 and $30,014,301, respectively)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US">Restricted cash and cash equivalents</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xlink:label="usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xlink:to="usl_UnrealizedGainLossOnOpenCommodityFuturesContracts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_UnrealizedGainLossOnOpenCommodityFuturesContracts_lbl" 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/label" xlink:label="usl_UnrealizedGainLossOnOpenCommodityFuturesContracts_lbl" 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="usl_UnrealizedGainLossOnOpenCommodityFuturesContracts_lbl" xml:lang="en-US">Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="usl_UnrealizedGainLossOnOpenCommodityFuturesContracts_lbl" xml:lang="en-US">Unrealized gain (loss) on open commodity futures contracts</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DividendsReceivable" xlink:label="us-gaap_DividendsReceivable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsReceivable" xlink:to="us-gaap_DividendsReceivable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsReceivable_lbl" xml:lang="en-US">Dividends Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsReceivable_lbl" xml:lang="en-US">Dividends receivable</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestReceivable" xlink:to="us-gaap_InterestReceivable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestReceivable_lbl" xml:lang="en-US">Interest Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InterestReceivable_lbl" xml:lang="en-US">Interest receivable</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_PrepaidLicenseFees" xlink:label="usl_PrepaidLicenseFees" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_PrepaidLicenseFees" xlink:to="usl_PrepaidLicenseFees_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_PrepaidLicenseFees_lbl" xml:lang="en-US">Amount of asset related to consideration paid in advance for license fees that provides economic benefits within a future period of one year or the normal operating cycle, if longer.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_PrepaidLicenseFees_lbl" xml:lang="en-US">Prepaid License Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_PrepaidLicenseFees_lbl" xml:lang="en-US">Prepaid license fees</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PrepaidInsurance" xlink:label="us-gaap_PrepaidInsurance" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidInsurance" xlink:to="us-gaap_PrepaidInsurance_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidInsurance_lbl" xml:lang="en-US">Prepaid Insurance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PrepaidInsurance_lbl" xml:lang="en-US">Prepaid insurance</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US">Assets.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US">Total Assets</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PartnersCapitalNotesAbstract" xlink:label="us-gaap_PartnersCapitalNotesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PartnersCapitalNotesAbstract" xlink:to="us-gaap_PartnersCapitalNotesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PartnersCapitalNotesAbstract_lbl" xml:lang="en-US">Partners Capital Notes [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PartnersCapitalNotesAbstract_lbl" xml:lang="en-US">Liabilities and Partners' Capital</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DueToCorrespondentBrokers" xlink:label="us-gaap_DueToCorrespondentBrokers" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DueToCorrespondentBrokers" xlink:to="us-gaap_DueToCorrespondentBrokers_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DueToCorrespondentBrokers_lbl" xml:lang="en-US">Due to Correspondent Brokers</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DueToCorrespondentBrokers_lbl" xml:lang="en-US">Payable due to Broker</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xlink:label="us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xlink:to="us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent_lbl" 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="us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent_lbl" xml:lang="en-US">General Partner management fees payable (Note 3)</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xlink:label="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xlink:to="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent_lbl" xml:lang="en-US">Accrued Professional Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent_lbl" xml:lang="en-US">Professional fees payable</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xlink:label="us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xlink:to="us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations_lbl" 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="us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations_lbl" xml:lang="en-US">Brokerage commissions payable</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ManagementFeePayable" xlink:label="us-gaap_ManagementFeePayable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ManagementFeePayable" xlink:to="us-gaap_ManagementFeePayable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ManagementFeePayable_lbl" xml:lang="en-US">Management Fee Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ManagementFeePayable_lbl" xml:lang="en-US">Directors' fees payable</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_LicenseFeesPayableCurrentAndNoncurrent" xlink:label="usl_LicenseFeesPayableCurrentAndNoncurrent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_LicenseFeesPayableCurrentAndNoncurrent" xlink:to="usl_LicenseFeesPayableCurrentAndNoncurrent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_LicenseFeesPayableCurrentAndNoncurrent_lbl" xml:lang="en-US">License fees payable Current and Noncurrent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_LicenseFeesPayableCurrentAndNoncurrent_lbl" 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="usl_LicenseFeesPayableCurrentAndNoncurrent_lbl" xml:lang="en-US">License fees payable</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_RegistrationFeesPayableCurrentAndNoncurrent" xlink:label="usl_RegistrationFeesPayableCurrentAndNoncurrent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_RegistrationFeesPayableCurrentAndNoncurrent" xlink:to="usl_RegistrationFeesPayableCurrentAndNoncurrent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_RegistrationFeesPayableCurrentAndNoncurrent_lbl" xml:lang="en-US">Registration fees payable Current and Noncurrent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_RegistrationFeesPayableCurrentAndNoncurrent_lbl" xml:lang="en-US">Registration Fees Payable Current And Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="usl_RegistrationFeesPayableCurrentAndNoncurrent_lbl" xml:lang="en-US">Registration fees payable</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US">Liabilities, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US">Total Liabilities</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US">Commitments And Contingencies</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US">Commitments and Contingencies (Notes 3, 4 &amp; 5)</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PartnersCapitalAbstract" xlink:label="us-gaap_PartnersCapitalAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PartnersCapitalAbstract" xlink:to="us-gaap_PartnersCapitalAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PartnersCapitalAbstract_lbl" xml:lang="en-US">Partners Capital [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PartnersCapitalAbstract_lbl" xml:lang="en-US">Partners' Capital</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeneralPartnersCapitalAccount" xlink:label="us-gaap_GeneralPartnersCapitalAccount" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralPartnersCapitalAccount" xlink:to="us-gaap_GeneralPartnersCapitalAccount_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralPartnersCapitalAccount_lbl" xml:lang="en-US">General Partners Capital Account</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GeneralPartnersCapitalAccount_lbl" xml:lang="en-US">General Partners</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LimitedPartnersCapitalAccount" xlink:label="us-gaap_LimitedPartnersCapitalAccount" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LimitedPartnersCapitalAccount" xlink:to="us-gaap_LimitedPartnersCapitalAccount_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LimitedPartnersCapitalAccount_lbl" xml:lang="en-US">Limited Partners Capital Account</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LimitedPartnersCapitalAccount_lbl" xml:lang="en-US">Limited Partners</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PartnersCapital" xlink:label="us-gaap_PartnersCapital" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PartnersCapital" xlink:to="us-gaap_PartnersCapital_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PartnersCapital_lbl" xml:lang="en-US">Partners Capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_PartnersCapital_lbl" xml:lang="en-US">Balances at end of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_PartnersCapital_lbl" xml:lang="en-US">Balances at beginning of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PartnersCapital_lbl" xml:lang="en-US">Total Partners' Capital</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US">Liabilities And Stockholders Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US">Total Liabilities and Partners' Capital</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xlink:label="us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xlink:to="us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_lbl" 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="us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_lbl" xml:lang="en-US">Limited Partners' shares outstanding</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NetAssetValuePerUnit" xlink:label="usl_NetAssetValuePerUnit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NetAssetValuePerUnit" xlink:to="usl_NetAssetValuePerUnit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NetAssetValuePerUnit_lbl" xml:lang="en-US">Net asset value per unit.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NetAssetValuePerUnit_lbl" xml:lang="en-US">Net Asset Value Per Unit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="usl_NetAssetValuePerUnit_lbl" xml:lang="en-US">Net asset value, end of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="usl_NetAssetValuePerUnit_lbl" xml:lang="en-US">Net asset value, beginning of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_NetAssetValuePerUnit_lbl" xml:lang="en-US">Net asset value per share</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_MarketValuePerUnit" xlink:label="usl_MarketValuePerUnit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_MarketValuePerUnit" xlink:to="usl_MarketValuePerUnit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_MarketValuePerUnit_lbl" xml:lang="en-US">Market value per unit.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_MarketValuePerUnit_lbl" xml:lang="en-US">Market Value Per Unit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_MarketValuePerUnit_lbl" xml:lang="en-US">Market value per share</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_StatementScheduleOfInvestmentsAbstract" xlink:label="usl_StatementScheduleOfInvestmentsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_StatementScheduleOfInvestmentsAbstract" xlink:to="usl_StatementScheduleOfInvestmentsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_StatementScheduleOfInvestmentsAbstract_lbl" xml:lang="en-US">Statement - Schedule of Investments [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_StatementScheduleOfInvestmentsAbstract_lbl" xml:lang="en-US">Condensed Schedule of Investments</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="us-gaap_CashAndCashEquivalentsAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAxis" xlink:to="us-gaap_CashAndCashEquivalentsAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAxis_lbl" xml:lang="en-US">Cash and Cash Equivalents [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:to="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_lbl" xml:lang="en-US">Cash and Cash Equivalents [Domain]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashEquivalentsMember" xlink:label="us-gaap_CashEquivalentsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashEquivalentsMember" xlink:to="us-gaap_CashEquivalentsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashEquivalentsMember_lbl" xml:lang="en-US">Cash Equivalents</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentPerformanceStatusAxis" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentPerformanceStatusAxis" xlink:to="us-gaap_FinancialInstrumentPerformanceStatusAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusAxis_lbl" xml:lang="en-US">Financial Instrument Performance Status [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentPerformanceStatusDomain" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentPerformanceStatusDomain" xlink:to="us-gaap_FinancialInstrumentPerformanceStatusDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusDomain_lbl" xml:lang="en-US">Financial Instrument Performance Status [Domain]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_OpenFuturesContractsLongMember" xlink:label="usl_OpenFuturesContractsLongMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_OpenFuturesContractsLongMember" xlink:to="usl_OpenFuturesContractsLongMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_OpenFuturesContractsLongMember_lbl" xml:lang="en-US">Open Futures Contracts, Long</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_OpenFuturesContractsLongMember_lbl" xml:lang="en-US">Open Futures Contracts, Long</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_StatementGeographicalAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_StatementGeographicalAxis_lbl" xml:lang="en-US">Geographical [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_SegmentGeographicalDomain" xlink:to="srt_SegmentGeographicalDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_SegmentGeographicalDomain_lbl" xml:lang="en-US">Geographical [Domain]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US" xlink:label="country_US" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_US" xlink:to="country_US_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="country_US_lbl" xml:lang="en-US">United States Contracts</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentSecondaryCategorizationAxis" xlink:label="us-gaap_InvestmentSecondaryCategorizationAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentSecondaryCategorizationAxis" xlink:to="us-gaap_InvestmentSecondaryCategorizationAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentSecondaryCategorizationAxis_lbl" xml:lang="en-US">Investment Secondary Categorization [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentsBySecondaryCategorizationDomain" xlink:label="us-gaap_InvestmentsBySecondaryCategorizationDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsBySecondaryCategorizationDomain" xlink:to="us-gaap_InvestmentsBySecondaryCategorizationDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentsBySecondaryCategorizationDomain_lbl" xml:lang="en-US">Investments by Secondary Categorization [Domain]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="us-gaap_MoneyMarketFundsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MoneyMarketFundsMember" xlink:to="us-gaap_MoneyMarketFundsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MoneyMarketFundsMember_lbl" xml:lang="en-US">United States - Money Market Funds</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_FinancialInstrumentAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xml:lang="en-US">Financial Instrument [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xml:lang="en-US">Financial Instruments [Domain]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesAugust2022ContractsExpiringJuly2022Member" xlink:label="usl_NymexWtiCrudeOilFuturesAugust2022ContractsExpiringJuly2022Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesAugust2022ContractsExpiringJuly2022Member" xlink:to="usl_NymexWtiCrudeOilFuturesAugust2022ContractsExpiringJuly2022Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesAugust2022ContractsExpiringJuly2022Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures August 2022 contracts, expiring July 2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesAugust2022ContractsExpiringJuly2022Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures August 2022 contracts, expiring July 2022</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesSeptember2022ContractsExpiringAugust2022Member" xlink:label="usl_NymexWtiCrudeOilFuturesSeptember2022ContractsExpiringAugust2022Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesSeptember2022ContractsExpiringAugust2022Member" xlink:to="usl_NymexWtiCrudeOilFuturesSeptember2022ContractsExpiringAugust2022Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesSeptember2022ContractsExpiringAugust2022Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures September 2022 contracts, expiring August 2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesSeptember2022ContractsExpiringAugust2022Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures September 2022 contracts, expiring August 2022</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesOctober2022ContractsExpiringSeptember2022Member" xlink:label="usl_NymexWtiCrudeOilFuturesOctober2022ContractsExpiringSeptember2022Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesOctober2022ContractsExpiringSeptember2022Member" xlink:to="usl_NymexWtiCrudeOilFuturesOctober2022ContractsExpiringSeptember2022Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesOctober2022ContractsExpiringSeptember2022Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures October 2022 contracts, expiring September 2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesOctober2022ContractsExpiringSeptember2022Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures October 2022 contracts, expiring September 2022</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesNovember2022ContractsExpiringOctober2022Member" xlink:label="usl_NymexWtiCrudeOilFuturesNovember2022ContractsExpiringOctober2022Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesNovember2022ContractsExpiringOctober2022Member" xlink:to="usl_NymexWtiCrudeOilFuturesNovember2022ContractsExpiringOctober2022Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesNovember2022ContractsExpiringOctober2022Member_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesNovember2022ContractsExpiringOctober2022Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures November 2022 Contracts Expiring October 2022</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesDecember2022ContractsExpiringNovember2022Member" xlink:label="usl_NymexWtiCrudeOilFuturesDecember2022ContractsExpiringNovember2022Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesDecember2022ContractsExpiringNovember2022Member" xlink:to="usl_NymexWtiCrudeOilFuturesDecember2022ContractsExpiringNovember2022Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesDecember2022ContractsExpiringNovember2022Member_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesDecember2022ContractsExpiringNovember2022Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures December 2022 Contracts Expiring November 2022</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesJanuary2023ContractsExpiringDecember2022Member" xlink:label="usl_NymexWtiCrudeOilFuturesJanuary2023ContractsExpiringDecember2022Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesJanuary2023ContractsExpiringDecember2022Member" xlink:to="usl_NymexWtiCrudeOilFuturesJanuary2023ContractsExpiringDecember2022Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesJanuary2023ContractsExpiringDecember2022Member_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesJanuary2023ContractsExpiringDecember2022Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures January 2023 Contracts Expiring December 2022</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesFebruary2023ContractsExpiringJanuary2023Member" xlink:label="usl_NymexWtiCrudeOilFuturesFebruary2023ContractsExpiringJanuary2023Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesFebruary2023ContractsExpiringJanuary2023Member" xlink:to="usl_NymexWtiCrudeOilFuturesFebruary2023ContractsExpiringJanuary2023Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesFebruary2023ContractsExpiringJanuary2023Member_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesFebruary2023ContractsExpiringJanuary2023Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures February 2023 Contracts Expiring January 2023</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesMarch2023ContractsExpiringFebruary2023Member" xlink:label="usl_NymexWtiCrudeOilFuturesMarch2023ContractsExpiringFebruary2023Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesMarch2023ContractsExpiringFebruary2023Member" xlink:to="usl_NymexWtiCrudeOilFuturesMarch2023ContractsExpiringFebruary2023Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesMarch2023ContractsExpiringFebruary2023Member_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesMarch2023ContractsExpiringFebruary2023Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures March 2023 Contracts Expiring February 2023</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesApril2023ContractsExpiringMarch2023Member" xlink:label="usl_NymexWtiCrudeOilFuturesApril2023ContractsExpiringMarch2023Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesApril2023ContractsExpiringMarch2023Member" xlink:to="usl_NymexWtiCrudeOilFuturesApril2023ContractsExpiringMarch2023Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesApril2023ContractsExpiringMarch2023Member_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesApril2023ContractsExpiringMarch2023Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures April 2023 Contracts Expiring March 2023</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesMay2023ContractsExpiringApril2023Member" xlink:label="usl_NymexWtiCrudeOilFuturesMay2023ContractsExpiringApril2023Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesMay2023ContractsExpiringApril2023Member" xlink:to="usl_NymexWtiCrudeOilFuturesMay2023ContractsExpiringApril2023Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesMay2023ContractsExpiringApril2023Member_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesMay2023ContractsExpiringApril2023Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures May 2023 contracts, expiring April 2023</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesJune2023ContractsExpiringMay2023Member" xlink:label="usl_NymexWtiCrudeOilFuturesJune2023ContractsExpiringMay2023Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesJune2023ContractsExpiringMay2023Member" xlink:to="usl_NymexWtiCrudeOilFuturesJune2023ContractsExpiringMay2023Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesJune2023ContractsExpiringMay2023Member_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesJune2023ContractsExpiringMay2023Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures June 2023 contracts, expiring May 2023</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NymexWtiCrudeOilFuturesJuly2023ContractsExpiringJune2023Member" xlink:label="usl_NymexWtiCrudeOilFuturesJuly2023ContractsExpiringJune2023Member" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NymexWtiCrudeOilFuturesJuly2023ContractsExpiringJune2023Member" xlink:to="usl_NymexWtiCrudeOilFuturesJuly2023ContractsExpiringJune2023Member_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NymexWtiCrudeOilFuturesJuly2023ContractsExpiringJune2023Member_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NymexWtiCrudeOilFuturesJuly2023ContractsExpiringJune2023Member_lbl" xml:lang="en-US">NYMEX WTI Crude Oil Futures July 2023 contracts, expiring June 2023</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeInstrumentRiskAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xml:lang="en-US">Derivative Instrument Risk [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_DerivativeContractTypeDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xml:lang="en-US">Derivative Contract Type [Domain]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_DreyfusInstitutionalPreferredGovernmentMoneyMarketFundInstitutionalSharesMember" xlink:label="usl_DreyfusInstitutionalPreferredGovernmentMoneyMarketFundInstitutionalSharesMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_DreyfusInstitutionalPreferredGovernmentMoneyMarketFundInstitutionalSharesMember" xlink:to="usl_DreyfusInstitutionalPreferredGovernmentMoneyMarketFundInstitutionalSharesMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_DreyfusInstitutionalPreferredGovernmentMoneyMarketFundInstitutionalSharesMember_lbl" xml:lang="en-US">NA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_DreyfusInstitutionalPreferredGovernmentMoneyMarketFundInstitutionalSharesMember_lbl" xml:lang="en-US">Dreyfus Institutional Preferred Government Money Market Fund - Institutional Shares</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" xlink:label="usl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" xlink:to="usl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember_lbl" xml:lang="en-US">Goldman Sachs Financial Square Government Fund - Institutional Shares</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_MorganStanleyInstitutionalLiquidityFundsGovernmentPortfolioMember" xlink:label="usl_MorganStanleyInstitutionalLiquidityFundsGovernmentPortfolioMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_MorganStanleyInstitutionalLiquidityFundsGovernmentPortfolioMember" xlink:to="usl_MorganStanleyInstitutionalLiquidityFundsGovernmentPortfolioMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_MorganStanleyInstitutionalLiquidityFundsGovernmentPortfolioMember_lbl" xml:lang="en-US">Morgan Stanley Institutional Liquidity Funds - Government Portfolio - Institutional Shares</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedAtFairValue" xlink:to="us-gaap_InvestmentOwnedAtFairValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xml:lang="en-US">Investment Owned, at Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xml:lang="en-US">Notional Amount</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentOwnedBalanceContracts" xlink:label="us-gaap_InvestmentOwnedBalanceContracts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedBalanceContracts" xlink:to="us-gaap_InvestmentOwnedBalanceContracts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentOwnedBalanceContracts_lbl" xml:lang="en-US">Investment Owned Balance Contracts</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentOwnedBalanceContracts_lbl" xml:lang="en-US">Number of Contracts</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount_lbl" 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="us-gaap_InvestmentOwnedBalancePrincipalAmount_lbl" xml:lang="en-US">Shares/Principal Amount</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xlink:label="us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xlink:to="us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue_lbl" 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="us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue_lbl" xml:lang="en-US">Market Value</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_PercentageOfPartnersCapital" xlink:label="usl_PercentageOfPartnersCapital" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_PercentageOfPartnersCapital" xlink:to="usl_PercentageOfPartnersCapital_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_PercentageOfPartnersCapital_lbl" xml:lang="en-US">Percentage of Partners Capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_PercentageOfPartnersCapital_lbl" xml:lang="en-US">Percentage Of Partners Capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_PercentageOfPartnersCapital_lbl" xml:lang="en-US">% of Partners' Capital</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" 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="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US">Interest rate</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xlink:label="us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xlink:to="us-gaap_InvestmentOwnedSubjectToOptionExerciseDates_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentOwnedSubjectToOptionExerciseDates_lbl" 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="us-gaap_InvestmentOwnedSubjectToOptionExerciseDates_lbl" xml:lang="en-US">Expiration date</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_CollateralAmountOnOpenFuturesContracts" xlink:label="usl_CollateralAmountOnOpenFuturesContracts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_CollateralAmountOnOpenFuturesContracts" xlink:to="usl_CollateralAmountOnOpenFuturesContracts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_CollateralAmountOnOpenFuturesContracts_lbl" xml:lang="en-US">The collateral amount on open future contracts.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_CollateralAmountOnOpenFuturesContracts_lbl" xml:lang="en-US">Collateral Amount On Open Futures Contracts</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xml:lang="en-US">Condensed Statements of Operations (Unaudited)</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenuesAbstract" xlink:label="us-gaap_RevenuesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_RevenuesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenuesAbstract_lbl" xml:lang="en-US">Revenues [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RevenuesAbstract_lbl" xml:lang="en-US">Income</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_GainLossOnCommodityFuturesAbstract" xlink:label="usl_GainLossOnCommodityFuturesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_GainLossOnCommodityFuturesAbstract" xlink:to="usl_GainLossOnCommodityFuturesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_GainLossOnCommodityFuturesAbstract_lbl" xml:lang="en-US">Gain (Loss) On Commodity Futures [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_GainLossOnCommodityFuturesAbstract_lbl" 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="usl_GainLossOnCommodityFuturesAbstract_lbl" xml:lang="en-US">Gain (loss) on trading of commodity futures contracts:</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossOnSaleOfInvestments" xlink:label="us-gaap_GainLossOnSaleOfInvestments" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfInvestments" xlink:to="us-gaap_GainLossOnSaleOfInvestments_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" 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="us-gaap_GainLossOnSaleOfInvestments_lbl" xml:lang="en-US">Realized gain (loss) on closed commodity futures contracts</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="us-gaap_UnrealizedGainLossOnInvestments" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnInvestments" xlink:to="us-gaap_UnrealizedGainLossOnInvestments_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrealizedGainLossOnInvestments_lbl" 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="us-gaap_UnrealizedGainLossOnInvestments_lbl" xml:lang="en-US">Change in unrealized gain (loss) on open commodity futures contracts</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DividendIncomeOperating" xlink:label="us-gaap_DividendIncomeOperating" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendIncomeOperating" xlink:to="us-gaap_DividendIncomeOperating_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendIncomeOperating_lbl" xml:lang="en-US">Dividend Income Operating</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendIncomeOperating_lbl" xml:lang="en-US">Dividend income</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestIncomeOperating" xlink:label="us-gaap_InterestIncomeOperating" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeOperating" xlink:to="us-gaap_InterestIncomeOperating_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestIncomeOperating_lbl" xml:lang="en-US">Interest Income Operating</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestIncomeOperating_lbl" xml:lang="en-US">Interest income</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherIncome" xlink:label="us-gaap_OtherIncome" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherIncome" xlink:to="us-gaap_OtherIncome_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherIncome_lbl" xml:lang="en-US">Other Income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherIncome_lbl" xml:lang="en-US">ETF transaction fees</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Revenues" xlink:to="us-gaap_Revenues_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Revenues_lbl" xml:lang="en-US">Revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Revenues_lbl" xml:lang="en-US">Total Income (Loss)</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="us-gaap_OperatingExpensesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpensesAbstract" xlink:to="us-gaap_OperatingExpensesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xml:lang="en-US">Operating Expenses [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xml:lang="en-US">Expenses</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ManagementFeeExpense" xlink:label="us-gaap_ManagementFeeExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ManagementFeeExpense" xlink:to="us-gaap_ManagementFeeExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ManagementFeeExpense_lbl" xml:lang="en-US">Management Fee Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ManagementFeeExpense_lbl" xml:lang="en-US">General Partner management fees (Note 3)</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProfessionalFees" xlink:label="us-gaap_ProfessionalFees" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfessionalFees" xlink:to="us-gaap_ProfessionalFees_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProfessionalFees_lbl" xml:lang="en-US">Professional Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProfessionalFees_lbl" xml:lang="en-US">Professional fees</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FloorBrokerageExchangeAndClearanceFees" xlink:label="us-gaap_FloorBrokerageExchangeAndClearanceFees" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FloorBrokerageExchangeAndClearanceFees" xlink:to="us-gaap_FloorBrokerageExchangeAndClearanceFees_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FloorBrokerageExchangeAndClearanceFees_lbl" xml:lang="en-US">Floor Brokerage Exchange And Clearance Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FloorBrokerageExchangeAndClearanceFees_lbl" xml:lang="en-US">Brokerage commissions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FloorBrokerageExchangeAndClearanceFees_lbl" xml:lang="en-US">Brokerage commissions</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NoninterestExpenseDirectorsFees" xlink:label="us-gaap_NoninterestExpenseDirectorsFees" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoninterestExpenseDirectorsFees" xlink:to="us-gaap_NoninterestExpenseDirectorsFees_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoninterestExpenseDirectorsFees_lbl" xml:lang="en-US">Noninterest Expense Directors Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/presentationGuidance" xlink:label="us-gaap_NoninterestExpenseDirectorsFees_lbl" xml:lang="en-US">Estimated directors' fees and expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NoninterestExpenseDirectorsFees_lbl" xml:lang="en-US">Directors' fees and insurance</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_LicenseFeesAndOtherOfferingExpenses" xlink:label="usl_LicenseFeesAndOtherOfferingExpenses" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_LicenseFeesAndOtherOfferingExpenses" xlink:to="usl_LicenseFeesAndOtherOfferingExpenses_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_LicenseFeesAndOtherOfferingExpenses_lbl" xml:lang="en-US">It represent the value of license fees and other offering expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_LicenseFeesAndOtherOfferingExpenses_lbl" xml:lang="en-US">License Fees And Other Offering Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_LicenseFeesAndOtherOfferingExpenses_lbl" xml:lang="en-US">License fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="usl_LicenseFeesAndOtherOfferingExpenses_lbl" xml:lang="en-US">Licensing fee incurred</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentCompanyRegistrationExpense" xlink:label="us-gaap_InvestmentCompanyRegistrationExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyRegistrationExpense" xlink:to="us-gaap_InvestmentCompanyRegistrationExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentCompanyRegistrationExpense_lbl" xml:lang="en-US">Investment Company, Registration Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentCompanyRegistrationExpense_lbl" xml:lang="en-US">Registration fees</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_TotalExpenses" xlink:label="usl_TotalExpenses" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_TotalExpenses" xlink:to="usl_TotalExpenses_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_TotalExpenses_lbl" xml:lang="en-US">Total Expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_TotalExpenses_lbl" xml:lang="en-US">Total Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="usl_TotalExpenses_lbl" xml:lang="en-US">Total Expenses</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net Income (Loss) Attributable to Parent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net income (loss)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net Income (Loss)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net income (loss)</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xlink:label="us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xlink:to="us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax_lbl" xml:lang="en-US">Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax_lbl" xml:lang="en-US">Net Income (Loss) per limited partner share</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xlink:label="us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xlink:to="us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted_lbl" 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/terseLabel" xlink:label="us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted_lbl" xml:lang="en-US">Net Income (Loss) per weighted average limited partner share</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xlink:label="us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xlink:to="us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding_lbl" xml:lang="en-US">Weighted Average Limited Partnership Units Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding_lbl" xml:lang="en-US">Weighted average limited partner shares outstanding</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementOfPartnersCapitalAbstract" xlink:label="us-gaap_StatementOfPartnersCapitalAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfPartnersCapitalAbstract" xlink:to="us-gaap_StatementOfPartnersCapitalAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfPartnersCapitalAbstract_lbl" xml:lang="en-US">Condensed Statement of Changes in Partners' Capital (Unaudited)</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PartnerCapitalComponentsAxis" xlink:label="us-gaap_PartnerCapitalComponentsAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PartnerCapitalComponentsAxis" xlink:to="us-gaap_PartnerCapitalComponentsAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PartnerCapitalComponentsAxis_lbl" xml:lang="en-US">Partner Capital Components [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PartnerCapitalComponentsDomain" xlink:label="us-gaap_PartnerCapitalComponentsDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PartnerCapitalComponentsDomain" xlink:to="us-gaap_PartnerCapitalComponentsDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PartnerCapitalComponentsDomain_lbl" xml:lang="en-US">Partner Capital Components [Domain]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LimitedPartnerMember" xlink:label="us-gaap_LimitedPartnerMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LimitedPartnerMember" xlink:to="us-gaap_LimitedPartnerMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LimitedPartnerMember_lbl" xml:lang="en-US">Limited Partners</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PartnersCapitalAccountContributions" xlink:label="us-gaap_PartnersCapitalAccountContributions" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PartnersCapitalAccountContributions" xlink:to="us-gaap_PartnersCapitalAccountContributions_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PartnersCapitalAccountContributions_lbl" xml:lang="en-US">Partners' Capital Account, Contributions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PartnersCapitalAccountContributions_lbl" xml:lang="en-US">Addition of 50,000, -,50,000 and - partnership shares, respectively</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PartnersCapitalAccountRedemptions" xlink:label="us-gaap_PartnersCapitalAccountRedemptions" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PartnersCapitalAccountRedemptions" xlink:to="us-gaap_PartnersCapitalAccountRedemptions_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PartnersCapitalAccountRedemptions_lbl" xml:lang="en-US">Partners Capital Account Redemptions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PartnersCapitalAccountRedemptions_lbl" xml:lang="en-US">Redemption of (450,000), (2,150,000), (1,550,000) and (4,050,000) partnership shares, respectively</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PartnersCapitalAccountUnitsContributed" xlink:label="us-gaap_PartnersCapitalAccountUnitsContributed" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PartnersCapitalAccountUnitsContributed" xlink:to="us-gaap_PartnersCapitalAccountUnitsContributed_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PartnersCapitalAccountUnitsContributed_lbl" xml:lang="en-US">Partners' Capital Account, Units, Contributed</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PartnersCapitalAccountUnitsContributed_lbl" xml:lang="en-US">Addition of partnership shares</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PartnersCapitalAccountUnitsRedeemed" xlink:label="us-gaap_PartnersCapitalAccountUnitsRedeemed" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PartnersCapitalAccountUnitsRedeemed" xlink:to="us-gaap_PartnersCapitalAccountUnitsRedeemed_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PartnersCapitalAccountUnitsRedeemed_lbl" xml:lang="en-US">Partners Capital Account Units Redeemed</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PartnersCapitalAccountUnitsRedeemed_lbl" xml:lang="en-US">Redemption of partnership unit shares</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US">Condensed Statements of Cash Flows (Unaudited)</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US">Cash Flows from Operating Activities:</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" 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="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US">Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xlink:label="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xlink:to="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts_lbl" xml:lang="en-US">Unrealized Gain Loss On Derivatives And Commodity Contracts</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts_lbl" xml:lang="en-US">Change in unrealized (gain) loss on open commodity futures contracts</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts_lbl" xml:lang="en-US">Change in Unrealized Gain (Loss) on Derivatives Recognized in Income</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:label="us-gaap_IncreaseDecreaseInDividendsReceivable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:to="us-gaap_IncreaseDecreaseInDividendsReceivable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInDividendsReceivable_lbl" 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="us-gaap_IncreaseDecreaseInDividendsReceivable_lbl" xml:lang="en-US">(Increase) decrease in dividends receivable</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:to="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" xml:lang="en-US">Increase (Decrease) in Accrued Interest Receivable, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" xml:lang="en-US">(Increase) decrease in interest receivable</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_IncreaseDecreaseInPrepaidLicenseFees" xlink:label="usl_IncreaseDecreaseInPrepaidLicenseFees" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_IncreaseDecreaseInPrepaidLicenseFees" xlink:to="usl_IncreaseDecreaseInPrepaidLicenseFees_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_IncreaseDecreaseInPrepaidLicenseFees_lbl" xml:lang="en-US">The increase (decrease) during the reporting period in the amount due from License fee paid in advance.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_IncreaseDecreaseInPrepaidLicenseFees_lbl" xml:lang="en-US">Increase Decrease In Prepaid License Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="usl_IncreaseDecreaseInPrepaidLicenseFees_lbl" xml:lang="en-US">(Increase) decrease in prepaid license fees</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInPrepaidInsurance" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidInsurance" xlink:to="us-gaap_IncreaseDecreaseInPrepaidInsurance_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance_lbl" xml:lang="en-US">Increase (Decrease) in Prepaid Insurance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance_lbl" xml:lang="en-US">(Increase) decrease in prepaid insurance</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_IncreaseDecreaseInPrepaidRegistrationFees" xlink:label="usl_IncreaseDecreaseInPrepaidRegistrationFees" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_IncreaseDecreaseInPrepaidRegistrationFees" xlink:to="usl_IncreaseDecreaseInPrepaidRegistrationFees_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_IncreaseDecreaseInPrepaidRegistrationFees_lbl" xml:lang="en-US">Amount of increase (decrease) of consideration paid in advance for registration fees.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_IncreaseDecreaseInPrepaidRegistrationFees_lbl" xml:lang="en-US">Increase (Decrease) In Prepaid Registration Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="usl_IncreaseDecreaseInPrepaidRegistrationFees_lbl" xml:lang="en-US">(Increase) decrease in prepaid registration fees</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" xlink:label="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" xlink:to="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers_lbl" 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="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers_lbl" xml:lang="en-US">Increase (decrease) in payable due to Broker</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_IncreaseDecreaseManagementFeesPayable" xlink:label="usl_IncreaseDecreaseManagementFeesPayable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_IncreaseDecreaseManagementFeesPayable" xlink:to="usl_IncreaseDecreaseManagementFeesPayable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_IncreaseDecreaseManagementFeesPayable_lbl" xml:lang="en-US">Increase (Decrease) Management Fees Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_IncreaseDecreaseManagementFeesPayable_lbl" 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="usl_IncreaseDecreaseManagementFeesPayable_lbl" xml:lang="en-US">Increase (decrease) in General Partner management fees payable</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_IncreaseDecreaseInProfessionalFeesPayable" xlink:label="usl_IncreaseDecreaseInProfessionalFeesPayable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_IncreaseDecreaseInProfessionalFeesPayable" xlink:to="usl_IncreaseDecreaseInProfessionalFeesPayable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_IncreaseDecreaseInProfessionalFeesPayable_lbl" xml:lang="en-US">Increase (Decrease) In Professional Fees Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_IncreaseDecreaseInProfessionalFeesPayable_lbl" 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="usl_IncreaseDecreaseInProfessionalFeesPayable_lbl" xml:lang="en-US">Increase (decrease) in professional fees payable</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders" xlink:label="us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders" xlink:to="us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders_lbl" 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="us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders_lbl" xml:lang="en-US">Increase (decrease) in directors' fees payable</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_IncreaseDecreaseInLicenseFeesPayable" xlink:label="usl_IncreaseDecreaseInLicenseFeesPayable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_IncreaseDecreaseInLicenseFeesPayable" xlink:to="usl_IncreaseDecreaseInLicenseFeesPayable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_IncreaseDecreaseInLicenseFeesPayable_lbl" xml:lang="en-US">Increase (Decrease) in License Fees Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_IncreaseDecreaseInLicenseFeesPayable_lbl" xml:lang="en-US">Increase Decrease In License Fees Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="usl_IncreaseDecreaseInLicenseFeesPayable_lbl" xml:lang="en-US">Increase (decrease) in license fees payable</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_IncreaseDecreaseInRegistrationFeesPayable" xlink:label="usl_IncreaseDecreaseInRegistrationFeesPayable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_IncreaseDecreaseInRegistrationFeesPayable" xlink:to="usl_IncreaseDecreaseInRegistrationFeesPayable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_IncreaseDecreaseInRegistrationFeesPayable_lbl" xml:lang="en-US">The amount of increase (decrease) in registration fees payable.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_IncreaseDecreaseInRegistrationFeesPayable_lbl" xml:lang="en-US">Increase (Decrease) In Registration Fees Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_IncreaseDecreaseInRegistrationFeesPayable_lbl" xml:lang="en-US">Increase (decrease) in registration fees payable</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US">Net cash provided by (used in) operating activities</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US">Cash Flows from Financing Activities:</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromPartnershipContribution" xlink:label="us-gaap_ProceedsFromPartnershipContribution" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromPartnershipContribution" xlink:to="us-gaap_ProceedsFromPartnershipContribution_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromPartnershipContribution_lbl" xml:lang="en-US">Proceeds From Partnership Contribution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromPartnershipContribution_lbl" xml:lang="en-US">Addition of partnership shares</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_PaymentsToPartnershipRedemption" xlink:label="usl_PaymentsToPartnershipRedemption" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_PaymentsToPartnershipRedemption" xlink:to="usl_PaymentsToPartnershipRedemption_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_PaymentsToPartnershipRedemption_lbl" xml:lang="en-US">Payments To Partnership Redemption</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_PaymentsToPartnershipRedemption_lbl" xml:lang="en-US">Payments To Partnership Redemption</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="usl_PaymentsToPartnershipRedemption_lbl" xml:lang="en-US">Redemption of partnership shares</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US">Net cash provided by (used in) financing activities</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xml:lang="en-US">Net Increase (Decrease) in Cash and Cash Equivalents</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xml:lang="en-US">Total Cash, Cash Equivalents and Equity in Trading Accounts, end of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xml:lang="en-US">Total Cash, Cash Equivalents and Equity in Trading Accounts, beginning of period</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract_lbl" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract_lbl" xml:lang="en-US">Components of Cash and Cash Equivalents:</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_EquityInTradingAccountsAbstract" xlink:label="usl_EquityInTradingAccountsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_EquityInTradingAccountsAbstract" xlink:to="usl_EquityInTradingAccountsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_EquityInTradingAccountsAbstract_lbl" xml:lang="en-US">Equity in Trading Accounts:</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_CashAndCashEquivalentsInTradingAccounts" xlink:label="usl_CashAndCashEquivalentsInTradingAccounts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_CashAndCashEquivalentsInTradingAccounts" xlink:to="usl_CashAndCashEquivalentsInTradingAccounts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_CashAndCashEquivalentsInTradingAccounts_lbl" xml:lang="en-US">The amount of cash and cash equivalents in trading accounts.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_CashAndCashEquivalentsInTradingAccounts_lbl" xml:lang="en-US">Cash And Cash Equivalents In Trading Accounts</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="usl_CashAndCashEquivalentsInTradingAccounts_lbl" xml:lang="en-US">Cash and cash equivalents</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_CashAndCashEquivalentsInEquityInTradingAccounts" xlink:label="usl_CashAndCashEquivalentsInEquityInTradingAccounts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_CashAndCashEquivalentsInEquityInTradingAccounts" xlink:to="usl_CashAndCashEquivalentsInEquityInTradingAccounts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_CashAndCashEquivalentsInEquityInTradingAccounts_lbl" xml:lang="en-US">Represents the amount of cash and cash equivalents in equity in trading accounts.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_CashAndCashEquivalentsInEquityInTradingAccounts_lbl" xml:lang="en-US">Cash and Cash Equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="usl_CashAndCashEquivalentsInEquityInTradingAccounts_lbl" xml:lang="en-US">Total Cash, Cash Equivalents and Equity in Trading Accounts</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xml:lang="en-US">ORGANIZATION AND BUSINESS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" 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="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xml:lang="en-US">ORGANIZATION AND BUSINESS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_AccountingPoliciesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xml:lang="en-US">SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xml:lang="en-US">Significant Accounting Policies [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xml:lang="en-US">SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_FeesPaidAndRelatedPartyTransactionsAbstract" xlink:to="usl_FeesPaidAndRelatedPartyTransactionsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_FeesPaidAndRelatedPartyTransactionsAbstract_lbl" xml:lang="en-US">FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock" xlink:label="usl_FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock" xlink:to="usl_FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock_lbl" xml:lang="en-US">Fees Paid and Related Party Transactions Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock_lbl" xml:lang="en-US">Fees Paid And Related Party Transactions Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock_lbl" xml:lang="en-US">FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractorsAbstract" xlink:label="us-gaap_ContractorsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractorsAbstract" xlink:to="us-gaap_ContractorsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ContractorsAbstract_lbl" xml:lang="en-US">CONTRACTS AND AGREEMENTS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermContractsOrProgramsDisclosureTextBlock" xlink:label="us-gaap_LongTermContractsOrProgramsDisclosureTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermContractsOrProgramsDisclosureTextBlock" xlink:to="us-gaap_LongTermContractsOrProgramsDisclosureTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermContractsOrProgramsDisclosureTextBlock_lbl" xml:lang="en-US">Long-term Contracts or Programs Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermContractsOrProgramsDisclosureTextBlock_lbl" xml:lang="en-US">CONTRACTS AND AGREEMENTS</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_FinancialInstrumentsOffBalanceSheetRisksAndContingenciesAbstract" xlink:label="usl_FinancialInstrumentsOffBalanceSheetRisksAndContingenciesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_FinancialInstrumentsOffBalanceSheetRisksAndContingenciesAbstract" xlink:to="usl_FinancialInstrumentsOffBalanceSheetRisksAndContingenciesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_FinancialInstrumentsOffBalanceSheetRisksAndContingenciesAbstract_lbl" xml:lang="en-US">FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentsDisclosureTextBlock" xlink:label="us-gaap_FinancialInstrumentsDisclosureTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentsDisclosureTextBlock" xlink:to="us-gaap_FinancialInstrumentsDisclosureTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FinancialInstrumentsDisclosureTextBlock_lbl" xml:lang="en-US">Financial Instruments Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FinancialInstrumentsDisclosureTextBlock_lbl" xml:lang="en-US">FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_FinancialHighlightsAbstract" xlink:label="usl_FinancialHighlightsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_FinancialHighlightsAbstract" xlink:to="usl_FinancialHighlightsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_FinancialHighlightsAbstract_lbl" xml:lang="en-US">FINANCIAL HIGHLIGHTS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalFinancialInformationDisclosureTextBlock" xlink:label="us-gaap_AdditionalFinancialInformationDisclosureTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalFinancialInformationDisclosureTextBlock" xlink:to="us-gaap_AdditionalFinancialInformationDisclosureTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalFinancialInformationDisclosureTextBlock_lbl" xml:lang="en-US">Additional Financial Information Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalFinancialInformationDisclosureTextBlock_lbl" xml:lang="en-US">FINANCIAL HIGHLIGHTS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueDisclosuresAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xml:lang="en-US">FAIR VALUE OF FINANCIAL INSTRUMENTS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="us-gaap_FairValueDisclosuresTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresTextBlock" xlink:to="us-gaap_FairValueDisclosuresTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xml:lang="en-US">Fair Value Disclosures [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xml:lang="en-US">FAIR VALUE OF FINANCIAL INSTRUMENTS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="us-gaap_SubsequentEventsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsAbstract" xlink:to="us-gaap_SubsequentEventsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xml:lang="en-US">SUBSEQUENT EVENTS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="us-gaap_SubsequentEventsTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsTextBlock" xlink:to="us-gaap_SubsequentEventsTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xml:lang="en-US">Subsequent Events [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xml:lang="en-US">SUBSEQUENT EVENTS</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xml:lang="en-US">Basis of Presentation and Significant Accounting Policies [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xml:lang="en-US">Basis of Presentation</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueRecognitionPolicyTextBlock" xlink:to="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xml:lang="en-US">Revenue Recognition, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xml:lang="en-US">Revenue Recognition</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommissionsPolicy" xlink:label="us-gaap_CommissionsPolicy" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommissionsPolicy" xlink:to="us-gaap_CommissionsPolicy_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommissionsPolicy_lbl" xml:lang="en-US">Commissions, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommissionsPolicy_lbl" xml:lang="en-US">Brokerage Commissions</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="us-gaap_IncomeTaxPolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxPolicyTextBlock" xlink:to="us-gaap_IncomeTaxPolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US">Income Tax, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US">Income Taxes</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharesSubjectToMandatoryRedemptionChangesInRedemptionValuePolicyTextBlock" xlink:label="us-gaap_SharesSubjectToMandatoryRedemptionChangesInRedemptionValuePolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesSubjectToMandatoryRedemptionChangesInRedemptionValuePolicyTextBlock" xlink:to="us-gaap_SharesSubjectToMandatoryRedemptionChangesInRedemptionValuePolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharesSubjectToMandatoryRedemptionChangesInRedemptionValuePolicyTextBlock_lbl" xml:lang="en-US">Shares Subject to Mandatory Redemption, Changes in Redemption Value, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharesSubjectToMandatoryRedemptionChangesInRedemptionValuePolicyTextBlock_lbl" xml:lang="en-US">Creations and Redemptions</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncentiveDistributionPolicyManagingMemberOrGeneralPartnerDescription" xlink:label="us-gaap_IncentiveDistributionPolicyManagingMemberOrGeneralPartnerDescription" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncentiveDistributionPolicyManagingMemberOrGeneralPartnerDescription" xlink:to="us-gaap_IncentiveDistributionPolicyManagingMemberOrGeneralPartnerDescription_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncentiveDistributionPolicyManagingMemberOrGeneralPartnerDescription_lbl" xml:lang="en-US">Incentive Distribution Policy, Managing Member or General Partner, Description [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncentiveDistributionPolicyManagingMemberOrGeneralPartnerDescription_lbl" xml:lang="en-US">Partnership Capital and Allocation of Partnership Income and Losses</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NetAssetValuePolicyTextBlock" xlink:label="usl_NetAssetValuePolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NetAssetValuePolicyTextBlock" xlink:to="usl_NetAssetValuePolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NetAssetValuePolicyTextBlock_lbl" xml:lang="en-US">Net Asset Value [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NetAssetValuePolicyTextBlock_lbl" xml:lang="en-US">Net Asset Value Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_NetAssetValuePolicyTextBlock_lbl" xml:lang="en-US">Calculation of Per Share NAV</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerSharePolicyTextBlock" xlink:to="us-gaap_EarningsPerSharePolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xml:lang="en-US">Earnings Per Share, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xml:lang="en-US">Net Income (Loss) Per Share</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_OtherOperatingIncomeExpensePolicyTextBlock" xlink:label="usl_OtherOperatingIncomeExpensePolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_OtherOperatingIncomeExpensePolicyTextBlock" xlink:to="usl_OtherOperatingIncomeExpensePolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_OtherOperatingIncomeExpensePolicyTextBlock_lbl" xml:lang="en-US">Other Operating Income (Expense), Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_OtherOperatingIncomeExpensePolicyTextBlock_lbl" 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="usl_OtherOperatingIncomeExpensePolicyTextBlock_lbl" xml:lang="en-US">Offering Costs</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xml:lang="en-US">Cash and Cash Equivalents, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xml:lang="en-US">Cash Equivalents</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:label="us-gaap_PriorPeriodReclassificationAdjustmentDescription" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:to="us-gaap_PriorPeriodReclassificationAdjustmentDescription_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PriorPeriodReclassificationAdjustmentDescription_lbl" 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="us-gaap_PriorPeriodReclassificationAdjustmentDescription_lbl" xml:lang="en-US">Reclassification</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UseOfEstimates" xlink:label="us-gaap_UseOfEstimates" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="us-gaap_UseOfEstimates_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UseOfEstimates_lbl" 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="us-gaap_UseOfEstimates_lbl" xml:lang="en-US">Use of Estimates</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_BrokerageCommissionsTableTextBlock" xlink:label="usl_BrokerageCommissionsTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_BrokerageCommissionsTableTextBlock" xlink:to="usl_BrokerageCommissionsTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_BrokerageCommissionsTableTextBlock_lbl" xml:lang="en-US">Tabular disclosure of fees earned by the broker commission.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_BrokerageCommissionsTableTextBlock_lbl" xml:lang="en-US">Brokerage Commissions [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="usl_BrokerageCommissionsTableTextBlock_lbl" xml:lang="en-US">Schedule of brokerage commissions</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xlink:label="usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock_lbl" 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/label" xlink:label="usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock_lbl" 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="usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock_lbl" xml:lang="en-US">Schedule of per unit performance data and other supplemental financial data</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xlink:label="us-gaap_FairValueMeasurementInputsDisclosureTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xlink:to="us-gaap_FairValueMeasurementInputsDisclosureTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementInputsDisclosureTextBlock_lbl" 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="us-gaap_FairValueMeasurementInputsDisclosureTextBlock_lbl" xml:lang="en-US">Schedule of valuation of securities using fair value hierarchy</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:to="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_lbl" 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="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_lbl" xml:lang="en-US">Schedule of fair value of derivative instruments</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:to="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_lbl" 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="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_lbl" xml:lang="en-US">Schedule of effect of derivative instruments</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xlink:label="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xlink:to="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable_lbl" 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/label" xlink:label="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable_lbl" 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="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable_lbl" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Table]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_CreationBasketsMember" xlink:label="usl_CreationBasketsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_CreationBasketsMember" xlink:to="usl_CreationBasketsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_CreationBasketsMember_lbl" xml:lang="en-US">This member stands for Creation Baskets.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_CreationBasketsMember_lbl" xml:lang="en-US">Creation Baskets</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xlink:label="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xlink:to="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems_lbl" 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/label" xlink:label="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems_lbl" 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="usl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems_lbl" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NumberOfLongTermFuturesContracts" xlink:label="usl_NumberOfLongTermFuturesContracts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NumberOfLongTermFuturesContracts" xlink:to="usl_NumberOfLongTermFuturesContracts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NumberOfLongTermFuturesContracts_lbl" xml:lang="en-US">Number of long term futures contract in relation to Crude oil.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NumberOfLongTermFuturesContracts_lbl" xml:lang="en-US">Number of Long Term Futures Contracts</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_NumberOfLongTermFuturesContracts_lbl" xml:lang="en-US">Number of oil futures contracts for light, sweet crude oil traded on the NYMEX</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_FeePaidPerOrder" xlink:label="usl_FeePaidPerOrder" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_FeePaidPerOrder" xlink:to="usl_FeePaidPerOrder_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_FeePaidPerOrder_lbl" xml:lang="en-US">Fee Paid Per Order</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_FeePaidPerOrder_lbl" xml:lang="en-US">Fee Paid Per Order</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_FeePaidPerOrder_lbl" 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>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NumberOfUnitsPerBasket" xlink:label="usl_NumberOfUnitsPerBasket" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NumberOfUnitsPerBasket" xlink:to="usl_NumberOfUnitsPerBasket_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NumberOfUnitsPerBasket_lbl" xml:lang="en-US">Number of Units per Basket</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NumberOfUnitsPerBasket_lbl" 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="usl_NumberOfUnitsPerBasket_lbl" xml:lang="en-US">Number of shares per basket</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_UnitsIssuedDuringPeriodUnitsNewIssues" xlink:label="usl_UnitsIssuedDuringPeriodUnitsNewIssues" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_UnitsIssuedDuringPeriodUnitsNewIssues" xlink:to="usl_UnitsIssuedDuringPeriodUnitsNewIssues_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_UnitsIssuedDuringPeriodUnitsNewIssues_lbl" xml:lang="en-US">Units Issued During Period, Units, New Issues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_UnitsIssuedDuringPeriodUnitsNewIssues_lbl" 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="usl_UnitsIssuedDuringPeriodUnitsNewIssues_lbl" xml:lang="en-US">Number of shares issued</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_UnitsIssuedDuringPeriodValueNewIssues" xlink:label="usl_UnitsIssuedDuringPeriodValueNewIssues" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_UnitsIssuedDuringPeriodValueNewIssues" xlink:to="usl_UnitsIssuedDuringPeriodValueNewIssues_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_UnitsIssuedDuringPeriodValueNewIssues_lbl" xml:lang="en-US">Units Issued During Period, Value, New Issues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_UnitsIssuedDuringPeriodValueNewIssues_lbl" 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="usl_UnitsIssuedDuringPeriodValueNewIssues_lbl" xml:lang="en-US">Value of shares issued</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NumberOfRegisteredUnits" xlink:label="usl_NumberOfRegisteredUnits" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NumberOfRegisteredUnits" xlink:to="usl_NumberOfRegisteredUnits_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NumberOfRegisteredUnits_lbl" xml:lang="en-US">Number of Registered Units</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NumberOfRegisteredUnits_lbl" xml:lang="en-US">Number Of Registered Units</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="usl_NumberOfRegisteredUnits_lbl" xml:lang="en-US">Number of registered shares</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_SignificantAccountingPoliciesTable" xlink:label="usl_SignificantAccountingPoliciesTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_SignificantAccountingPoliciesTable" xlink:to="usl_SignificantAccountingPoliciesTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_SignificantAccountingPoliciesTable_lbl" xml:lang="en-US">Significant Accounting Policies [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_SignificantAccountingPoliciesTable_lbl" xml:lang="en-US">Significant Accounting Policies [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_SignificantAccountingPoliciesTable_lbl" xml:lang="en-US">Significant Accounting Policies [Table]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_SignificantAccountingPoliciesLineItems" xlink:label="usl_SignificantAccountingPoliciesLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_SignificantAccountingPoliciesLineItems" xlink:to="usl_SignificantAccountingPoliciesLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_SignificantAccountingPoliciesLineItems_lbl" xml:lang="en-US">Significant Accounting Policies [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_SignificantAccountingPoliciesLineItems_lbl" 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="usl_SignificantAccountingPoliciesLineItems_lbl" xml:lang="en-US">Significant Accounting Policies [Line Items]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_NumberOfSharesPerBasket" xlink:label="usl_NumberOfSharesPerBasket" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_NumberOfSharesPerBasket" xlink:to="usl_NumberOfSharesPerBasket_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_NumberOfSharesPerBasket_lbl" xml:lang="en-US">Number of Shares per Basket.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_NumberOfSharesPerBasket_lbl" xml:lang="en-US">Number of Shares per basket</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_NumberOfSharesPerBasket_lbl" xml:lang="en-US">Number of Shares per basket</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" 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="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xml:lang="en-US">Investment Type [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_InvestmentTypeCategorizationMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xml:lang="en-US">Investment Type Categorization [Domain]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_FundTrustsMember" xlink:label="usl_FundTrustsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_FundTrustsMember" xlink:to="usl_FundTrustsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_FundTrustsMember_lbl" xml:lang="en-US">Fund Trusts [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_FundTrustsMember_lbl" xml:lang="en-US">USL and the Related Public Funds, other than USCI, USAG, CPER and USMI</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_GroupThreeMember" xlink:label="usl_GroupThreeMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_GroupThreeMember" xlink:to="usl_GroupThreeMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_GroupThreeMember_lbl" xml:lang="en-US">Group Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_GroupThreeMember_lbl" xml:lang="en-US">On and after October 20, 2011</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_StatementScenarioAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_StatementScenarioAxis_lbl" xml:lang="en-US">Scenario [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioUnspecifiedDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xml:lang="en-US">Scenario, Unspecified [Domain]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioForecastMember" xlink:label="srt_ScenarioForecastMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioForecastMember" xlink:to="srt_ScenarioForecastMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_ScenarioForecastMember_lbl" xml:lang="en-US">Scenario Forecast</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_FeesPaidAndRelatedPartyTransactionsLineItems" xlink:label="usl_FeesPaidAndRelatedPartyTransactionsLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_FeesPaidAndRelatedPartyTransactionsLineItems" xlink:to="usl_FeesPaidAndRelatedPartyTransactionsLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_FeesPaidAndRelatedPartyTransactionsLineItems_lbl" 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/label" xlink:label="usl_FeesPaidAndRelatedPartyTransactionsLineItems_lbl" 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="usl_FeesPaidAndRelatedPartyTransactionsLineItems_lbl" xml:lang="en-US">Fees Paid and Related Party Transactions [Line Items]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_PercentageOfManagementFeeInAverageDailyTotalNetAssets" xlink:label="usl_PercentageOfManagementFeeInAverageDailyTotalNetAssets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_PercentageOfManagementFeeInAverageDailyTotalNetAssets" xlink:to="usl_PercentageOfManagementFeeInAverageDailyTotalNetAssets_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_PercentageOfManagementFeeInAverageDailyTotalNetAssets_lbl" xml:lang="en-US">Percentage of Management Fee In Average Daily Total Net Assets.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_PercentageOfManagementFeeInAverageDailyTotalNetAssets_lbl" xml:lang="en-US">Percentage of Management Fee in Average Daily Total Net Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_PercentageOfManagementFeeInAverageDailyTotalNetAssets_lbl" xml:lang="en-US">Percentage of management fee in average daily total net assets</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_BaseFeePercentage" xlink:label="usl_BaseFeePercentage" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_BaseFeePercentage" xlink:to="usl_BaseFeePercentage_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_BaseFeePercentage_lbl" xml:lang="en-US">Base Fee Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_BaseFeePercentage_lbl" xml:lang="en-US">Base Fee Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_BaseFeePercentage_lbl" xml:lang="en-US">Fee percentage</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherGeneralExpense" xlink:label="us-gaap_OtherGeneralExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherGeneralExpense" xlink:to="us-gaap_OtherGeneralExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherGeneralExpense_lbl" xml:lang="en-US">Other General Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherGeneralExpense_lbl" xml:lang="en-US">Investor tax reporting cost</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NatureOfExpenseAxis" xlink:label="us-gaap_NatureOfExpenseAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NatureOfExpenseAxis" xlink:to="us-gaap_NatureOfExpenseAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NatureOfExpenseAxis_lbl" xml:lang="en-US">Nature Of Expense [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterimPeriodCostsNotAllocableDomain" xlink:label="us-gaap_InterimPeriodCostsNotAllocableDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterimPeriodCostsNotAllocableDomain" xlink:to="us-gaap_InterimPeriodCostsNotAllocableDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterimPeriodCostsNotAllocableDomain_lbl" xml:lang="en-US">Interim Period Costs Not Allocable [Domain]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_RebalancingInvestmentsTransactionMember" xlink:label="usl_RebalancingInvestmentsTransactionMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_RebalancingInvestmentsTransactionMember" xlink:to="usl_RebalancingInvestmentsTransactionMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_RebalancingInvestmentsTransactionMember_lbl" xml:lang="en-US">Rebalancing Investments Transaction [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_RebalancingInvestmentsTransactionMember_lbl" xml:lang="en-US">Rebalancing Investments Transaction [Member]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_TradesNecessitatedByCreationAndRedemptionActivityMember" xlink:label="usl_TradesNecessitatedByCreationAndRedemptionActivityMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_TradesNecessitatedByCreationAndRedemptionActivityMember" xlink:to="usl_TradesNecessitatedByCreationAndRedemptionActivityMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_TradesNecessitatedByCreationAndRedemptionActivityMember_lbl" 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/label" xlink:label="usl_TradesNecessitatedByCreationAndRedemptionActivityMember_lbl" xml:lang="en-US">Trades Necessitated By Creation And Redemption Activity [Member]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xlink:label="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xlink:to="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems_lbl" 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="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems_lbl" xml:lang="en-US">Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_PercentageOfAverageDailyNetAssets" xlink:label="usl_PercentageOfAverageDailyNetAssets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_PercentageOfAverageDailyNetAssets" xlink:to="usl_PercentageOfAverageDailyNetAssets_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_PercentageOfAverageDailyNetAssets_lbl" xml:lang="en-US">Percentage of Average Daily Net Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_PercentageOfAverageDailyNetAssets_lbl" 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="usl_PercentageOfAverageDailyNetAssets_lbl" xml:lang="en-US">Brokerage commissions as a percentage of average daily net assets</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" xlink:label="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" xlink:to="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable_lbl" 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="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable_lbl" xml:lang="en-US">Long-Duration Contracts, Assumptions, by Product and Guarantee [Table]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="us-gaap_TypeOfArrangementAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xml:lang="en-US">Type Of Arrangement [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xml:lang="en-US">Arrangements and Non-arrangement Transactions [Domain]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_MarketingAgreementMember" xlink:label="usl_MarketingAgreementMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_MarketingAgreementMember" xlink:to="usl_MarketingAgreementMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_MarketingAgreementMember_lbl" xml:lang="en-US">Marketing Agreement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_MarketingAgreementMember_lbl" xml:lang="en-US">Marketing Agreement</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_GroupFourMember" xlink:label="usl_GroupFourMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_GroupFourMember" xlink:to="usl_GroupFourMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_GroupFourMember_lbl" xml:lang="en-US">Group Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_GroupFourMember_lbl" xml:lang="en-US">USL's assets up to $3 billion</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_GroupFiveMember" xlink:label="usl_GroupFiveMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_GroupFiveMember" xlink:to="usl_GroupFiveMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_GroupFiveMember_lbl" xml:lang="en-US">Group Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_GroupFiveMember_lbl" xml:lang="en-US">USL's assets in excess of $3 billion</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_RangeAxis_lbl" xml:lang="en-US">Range [Axis]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember" xlink:label="srt_RangeMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeMember" xlink:to="srt_RangeMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_RangeMember_lbl" xml:lang="en-US">Range [Domain]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MaximumMember_lbl" xml:lang="en-US">Maximum [Member]</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MinimumMember_lbl" xml:lang="en-US">Minimum [Member]</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_BasisAmountForFeePercentage" xlink:label="usl_BasisAmountForFeePercentage" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_BasisAmountForFeePercentage" xlink:to="usl_BasisAmountForFeePercentage_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_BasisAmountForFeePercentage_lbl" xml:lang="en-US">Basis Amount for Fee Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_BasisAmountForFeePercentage_lbl" 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="usl_BasisAmountForFeePercentage_lbl" xml:lang="en-US">Base amount for determining fee percentage</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_CommissionsPaid" xlink:label="usl_CommissionsPaid" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_CommissionsPaid" xlink:to="usl_CommissionsPaid_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_CommissionsPaid_lbl" xml:lang="en-US">Commissions Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_CommissionsPaid_lbl" xml:lang="en-US">Commissions Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="usl_CommissionsPaid_lbl" 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>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DepositsMoneyMarketDeposits" xlink:label="us-gaap_DepositsMoneyMarketDeposits" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositsMoneyMarketDeposits" xlink:to="us-gaap_DepositsMoneyMarketDeposits_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepositsMoneyMarketDeposits_lbl" xml:lang="en-US">Deposits Money Market Deposits</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DepositsMoneyMarketDeposits_lbl" xml:lang="en-US">Cash investments in money market funds</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Deposits" xlink:label="us-gaap_Deposits" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Deposits" xlink:to="us-gaap_Deposits_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Deposits_lbl" xml:lang="en-US">Deposits</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Deposits_lbl" xml:lang="en-US">Deposits in domestic and foreign financial institutions</label>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xlink:label="us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xlink:to="us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_lbl" 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="us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_lbl" xml:lang="en-US">Per Share Operating Performance:</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_TotalIncomeLossPerUnit" xlink:label="usl_TotalIncomeLossPerUnit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_TotalIncomeLossPerUnit" xlink:to="usl_TotalIncomeLossPerUnit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_TotalIncomeLossPerUnit_lbl" xml:lang="en-US">Total Income (Loss), Per Unit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_TotalIncomeLossPerUnit_lbl" 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="usl_TotalIncomeLossPerUnit_lbl" xml:lang="en-US">Total income (loss)</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_TotalExpensesPerUnit" xlink:label="usl_TotalExpensesPerUnit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_TotalExpensesPerUnit" xlink:to="usl_TotalExpensesPerUnit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_TotalExpensesPerUnit_lbl" xml:lang="en-US">Total Expenses, Per Unit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_TotalExpensesPerUnit_lbl" xml:lang="en-US">Total Expenses Per Unit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="usl_TotalExpensesPerUnit_lbl" xml:lang="en-US">Total expenses</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_IncreaseDecreaseInNetAssetValuePerUnit" xlink:label="usl_IncreaseDecreaseInNetAssetValuePerUnit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_IncreaseDecreaseInNetAssetValuePerUnit" xlink:to="usl_IncreaseDecreaseInNetAssetValuePerUnit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_IncreaseDecreaseInNetAssetValuePerUnit_lbl" 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/label" xlink:label="usl_IncreaseDecreaseInNetAssetValuePerUnit_lbl" 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="usl_IncreaseDecreaseInNetAssetValuePerUnit_lbl" xml:lang="en-US">Net increase (decrease) in net asset value</label>
    <loc xlink:type="locator" xlink:href="usl-20220630.xsd#usl_RateOfReturnOnAverageAsset" xlink:label="usl_RateOfReturnOnAverageAsset" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_RateOfReturnOnAverageAsset" xlink:to="usl_RateOfReturnOnAverageAsset_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="usl_RateOfReturnOnAverageAsset_lbl" xml:lang="en-US">Rate Of Return On Average Asset</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="usl_RateOfReturnOnAverageAsset_lbl" 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="usl_RateOfReturnOnAverageAsset_lbl" xml:lang="en-US">Total Return</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="usl_AverageNetAssetsAbstract" xlink:to="usl_AverageNetAssetsAbstract_lbl" />
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