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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 14pt; font-weight: bold;">UNITED STATES</div>

    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 14pt; font-weight: bold;">SECURITIES AND EXCHANGE COMMISSION</div>

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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Securities registered pursuant to Section 12(b) of the Act:</div>

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    <div style="font-size: 10pt;">&#160;</div>

    <div style="text-align: justify; font-family: 'Times New Roman'; font-size: 10pt;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167;230.405 of this chapter) or Rule 12b-2
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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised
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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">
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  <tr>

    <td style="width: 63pt; vertical-align: top; align: right; color: #000000; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">Item 1.02</td>

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              <div style="color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-weight: bold;">Termination of a Material Definitive Agreement</div>
            </td>

  </tr>


</table>
      <div style="font-size: 10pt;">&#160;</div>

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      <div style="text-align: justify; color: #000000; font-family: 'Times New Roman'; font-size: 10pt;">On February 16, 2021, NuStar Energy L.P. (the &#8220;Partnership&#8221;) terminated the Term Loan Credit Agreement, dated as of April 19, 2020 (the &#8220;Term Loan
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  <tr>

    <td style="width: 63pt; vertical-align: top; align: right; color: #000000; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">Item 2.03</td>

    <td style="width: auto; vertical-align: top; text-align: justify; font-size: 10pt;">
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        pro forma adjustments with respect to the repayment or extinguishment and assumption or incurrence of indebtedness, subject to certain limitations, in calculating consolidated interest expense; and (ii) increase the available cash netting amount
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      <div style="text-align: justify; color: #000000; font-family: 'Times New Roman'; font-size: 10pt;">The description of the Ninth Amendment contained in this Current Report on Form 8-K does not purport to be complete and is qualified in its entirety by
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                  <div style="text-align: center; color: #000000; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">Description</div>
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  </tr>

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                <div style="text-align: justify; color: #000000; font-family: 'Times New Roman'; font-size: 10pt;">Ninth Amendment to Amended and Restated 5-Year Revolving Credit Agreement, dated as of February 16, 2021, among NuStar Logistics, L.P.,
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  </tr>

  <tr>

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                <div style="text-align: left; color: #000000; font-family: 'Times New Roman'; font-size: 10pt;">Exhibit 104</div>
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    <div style="text-align: justify; color: #000000; font-family: 'Times New Roman'; font-size: 10pt;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the
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    <td rowspan="1" style="width: 50%; vertical-align: top;">&#160;</td>

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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">By:</div>
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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Riverwalk Logistics, L.P.</div>
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    <td style="width: 50%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

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    <td rowspan="1" style="width: 50%; vertical-align: top;">&#160;</td>

    <td rowspan="1" style="width: 5%; vertical-align: top;">&#160;</td>

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    <td style="width: 5%; vertical-align: top;"><br />
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    <td style="width: 50%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td colspan="2" style="vertical-align: top;">
              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">its general partner</div>
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    <td rowspan="1" style="width: 50%; vertical-align: top;">&#160;</td>

    <td rowspan="1" style="width: 5%; vertical-align: top;">&#160;</td>

    <td rowspan="1" style="width: 5%; vertical-align: top;">&#160;</td>

    <td rowspan="1" colspan="2" style="vertical-align: top;">&#160;</td>

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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Date: February 18<span style="font-size: 10pt; font-family: 'Times New Roman'; color: #000000;">, 2021</span></div>
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    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">
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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">/s/ Amy L. Perry</div>
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  <tr>

    <td style="width: 50%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">
              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Name:</div>
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    <td style="width: 50%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">
              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Title:</div>
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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Executive Vice President&#8212;Strategic</div>
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  </tr>

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    <td style="width: 50%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

    <td style="width: 5%; vertical-align: top;">&#160;</td>

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<DESCRIPTION>EXHIBIT 10.01
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">
      <div style="text-align: right; font-family: 'Times New Roman'; font-size: 10pt; font-style: italic; font-weight: bold;">Execution Version</div>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">NINTH AMENDMENT</div>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">NINTH AMENDMENT TO AMENDED AND RESTATED </div>
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    <div style="text-align: justify; text-indent: 36pt; font-family: 'Times New Roman'; font-size: 10pt;"><font style="font-size: 10pt; font-family: 'Times New Roman'; font-weight: bold;">THIS NINTH AMENDMENT</font><font style="font-size: 10pt; font-family: 'Times New Roman'; font-weight: bold;"> TO AMENDED AND RESTATED 5-YEAR REVOLVING CREDIT AGREEMENT</font> (this &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Ninth Amendment</u></font>&#8221;) dated as of February 16,
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      partnership (the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Borrower</u></font>&#8221;); <font style="font-size: 10pt; font-family: 'Times New Roman'; font-weight: bold;">NUSTAR ENERGY L.P., </font>a Delaware limited partnership
      (the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>MLP</u></font>&#8221;); <font style="font-size: 10pt; font-family: 'Times New Roman'; font-weight: bold;">NUSTAR PIPELINE OPERATING PARTNERSHIP L.P.</font>, a Delaware limited
      partnership (the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Subsidiary Guarantor</u></font>&#8221; and, together with the Borrower and the MLP, the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Obligors</u></font>&#8221;);&#160;

      <font style="font-size: 10pt; font-family: 'Times New Roman'; font-weight: bold;">JPMORGAN CHASE BANK, N.A.</font>, as administrative agent (in such capacity, together with its successors in such capacity, the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Administrative Agent</u></font>&#8221;) for the lenders party to the Credit Agreement referred to below (collectively, the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Lenders</u></font>&#8221;); and
      the undersigned Lenders.</div>
    <div>&#160;</div>
    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;"><u>R E C I T A L S</u></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">A.</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="font-size: 10pt; font-family: 'Times New Roman';">The Borrower, the MLP, the Administrative Agent and
        the Lenders are parties to that certain Amended and Restated 5-Year Revolving Credit Agreement dated as of October 29, 2014 (as amended, modified or supplemented prior to the date hereof, the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Credit Agreement</u></font>&#8221;), pursuant to which the Lenders have made certain extensions of credit available to the Borrower.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">B.</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">The Subsidiary Guarantor is a party to that certain
        Amended and Restated Subsidiary Guaranty Agreement dated as of October 29, 2014 made by each of the Guarantors (as defined therein) in favor of the Administrative Agent (the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Subsidiary

            Guaranty</u></font>&#8221;).</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">C.</font>&#160;&#160;&#160;&#160; &#160; &#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">The Borrower has requested and the Lenders have
        agreed to amend certain provisions of the Credit Agreement.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">D.</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">NOW, THEREFORE, in consideration of the premises and
        the mutual covenants herein contained, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:</font></div>
    <div>&#160;</div>
    <div style="text-align: justify;"><font style="font-size: 10pt; font-family: 'Times New Roman';">Section 1.</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; &#160; <font style="font-size: 10pt; font-family: 'Times New Roman';"><font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Defined

            Terms</u></font>.&#160; Each capitalized term used herein but not otherwise defined herein has the meaning given such term in the Credit Agreement.&#160; Unless otherwise indicated, all references to Sections in this Ninth Amendment refer to Sections of
        the Credit Agreement.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify;"><font style="font-size: 10pt; font-family: 'Times New Roman';">Section 2.</font>&#160;&#160;&#160;&#160;&#160;&#160; &#160; &#160; &#160; <font style="font-size: 10pt; font-family: 'Times New Roman';"><font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Amendments to the Credit Agreement</u></font>.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">2.1</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="font-family: 'Times New Roman'; font-size: 10pt;"><u>Section 1.01 is hereby amended as follows:</u></font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 72pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">(a)</font>&#160;&#160; &#160; &#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">The definition of &#8220;Consolidated EBITDA&#8221; is hereby
        amended by adding the following sentence at the end thereof: &#8220;Notwithstanding anything to the contrary set forth in this definition, all Non-Controlling Interest Income shall be excluded from Consolidated EBITDA (and none of the foregoing add-backs
        to Consolidated EBITDA shall be permitted in respect of any Non-Controlling Interest Income).&#8221;.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 72pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">(b)</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">The definition of &#8220;Consolidated Debt Coverage Ratio&#8221;
        is hereby amended by replacing the reference to &#8220;$200,000,000&#8221; therein with &#8220;$275,000,000&#8221;.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 72pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">(c)</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="font-size: 10pt; font-family: 'Times New Roman';">Each of the following definitions is hereby amended
        and restated in its entirety to read as follows:</font></div>
    <div>&#160;</div>
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    <!--PROfilePageNumberReset%Num%2%%%-->
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt; font-family: 'Times New Roman'; font-size: 10pt;">&#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Available Cash Netting Amount</u></font>&#8221;
      means, as of the last day of any Rolling Period, the aggregate amount of Unrestricted Cash as of such date that is held in accounts of the Borrower maintained with one or more Lenders in excess of $25,000,000, but only to the extent that the
      Borrower, on such date, specifically intends to use such excess Unrestricted Cash to Redeem, during the period from and including the last day of such Rolling Period to but excluding the date that is 365 days thereafter (such period, when used in
      reference to Specified Redemption Indebtedness applicable to any Available Cash Netting Amount, the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Specified Redemption Period</u></font>&#8221;), the principal amount of Indebtedness of
      the MLP or any of its Restricted Subsidiaries outstanding on the last day of such Rolling Period, as such Indebtedness (and the principal amount thereof) is specified in the compliance certificate delivered to the Administrative Agent and the Lenders
      for such Rolling Period pursuant to Section 5.01(c) (such Indebtedness applicable to any Available Cash Netting Amount, the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Specified Redemption Indebtedness</u></font>&#8221;).</div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt; font-family: 'Times New Roman'; font-size: 10pt;">&#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Consolidated Interest Expense</u></font>&#8221;
      means, for any Rolling Period, the sum (determined without duplication) of (a) the consolidated interest expense of the MLP and its Restricted Subsidiaries for such Rolling Period, whether paid or accrued, determined in accordance with GAAP, and (b)
      all cash dividend payments or other cash distributions in respect of any series of preferred equity of the MLP or its Restricted Subsidiaries made during such Rolling Period.&#160; Consolidated Interest Expense for any Rolling Period shall be calculated
      by the Borrower in good faith on a pro forma basis to give effect to any Indebtedness permanently repaid or extinguished, or any Indebtedness assumed or incurred, in each case at any time during such Rolling Period in connection with acquisitions,
      Investments (other than Joint Venture Interests), sales or other transfers of property (including any contributions of assets to joint ventures not otherwise prohibited hereby, but excluding any dispositions in the ordinary course of business) by the
      MLP and its Restricted Subsidiaries during such Rolling Period, in each case as if such repayment, extinguishment, assumption or incurrence had been effected on the first day of such Rolling Period; <font style="font-size: 10pt; font-family: 'Times New Roman';"><u>provided</u></font> that any such pro forma adjustment with respect to a repayment or extinguishment of Indebtedness shall be permitted only if (x) the aggregate amount of Indebtedness of the MLP and its Restricted Subsidiaries on
      the last day of the fiscal quarter in which such repayment or extinguishment of Indebtedness occurred is less than or equal to (y) the aggregate amount of Indebtedness of the MLP and its Restricted Subsidiaries on the last day of the fiscal quarter
      immediately preceding the quarter in which such repayment or extinguishment of Indebtedness occurred.&#160; For purposes of any such pro forma adjustment with respect to any Indebtedness assumed or incurred that bears a floating rate of interest, the
      interest expense for the portion of the Rolling Period prior to the date on which such Indebtedness was assumed or incurred shall be calculated using the interest rate in effect on the last day of the Rolling Period.</div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt; font-family: 'Times New Roman'; font-size: 10pt;">&#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Consolidated Operating Income</u></font>&#8221;
      means, as to the MLP and its Restricted Subsidiaries on a consolidated basis for each Rolling Period, the amount equal to gross margin minus operating expenses, general and administrative expenses, depreciation and amortization, taxes (other than
      income taxes) and Non-Controlling Interest Income, in each case for such period.</div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 72pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">(d)</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="font-size: 10pt; font-family: 'Times New Roman';">Each of the following definitions is hereby added
        where alphabetically appropriate:</font></div>
    <div>&#160;</div>
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      <div id="DSPFPageBreak" style="page-break-after:always;">
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    </div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt; font-family: 'Times New Roman'; font-size: 10pt;">&#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Non-Controlling Interest</u></font>&#8221; means
      any non-controlling equity interests or minority equity interests of unaffiliated third parties in any non-wholly owned Subsidiary.</div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt; font-family: 'Times New Roman'; font-size: 10pt;">&#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Non-Controlling Interest Income</u></font>&#8221;
      means the amount of income attributable to any Non-Controlling Interest.</div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt; font-family: 'Times New Roman'; font-size: 10pt;">&#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Specified Redemption Indebtedness</u></font>&#8221;
      has the meaning assigned to such term in the definition of &#8220;Available Cash Netting Amount&#8221;.</div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt; font-family: 'Times New Roman'; font-size: 10pt;">&#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Specified Redemption Period</u></font>&#8221; has
      the meaning assigned to such term in the definition of &#8220;Available Cash Netting Amount&#8221;.</div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">2.2</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="font-size: 10pt; font-family: 'Times New Roman';"><font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Amendment to Section 5.01(a)-(c)</u></font>.&#160; Sections 5.01(a), (b) and (c) are hereby amended and restated in their entirety to read as follows:</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">(a)</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">no later than
        15 days following the date required by applicable SEC rules (without giving effect to any extensions available thereunder) for the filing of such financial statements after the end of each fiscal year of the MLP, the MLP&#8217;s most recent annual report
        on Form 10-K, which includes the consolidated financial statements of the MLP, reported on by KPMG LLP or other independent public accountants of recognized national standing (without a &#8220;going concern&#8221; or like qualification or exception and without
        any qualification or exception as to the scope of such audit), as well as the financial statements of the Borrower, which will be provided as a separate document in addition to the Form 10-K, all certified by one of the MLP&#8217;s Financial Officer to
        the effect that such financial statements present fairly in all material respects the financial condition, results of operations and cash flows of the MLP and its consolidated subsidiaries, including the Borrower, in accordance with GAAP
        consistently applied except for the lack of footnotes with respect to the Borrower;</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">(b)</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">no later than
        15 days following the date required by applicable SEC rules (without giving effect to any extensions available thereunder) for the filing of such financial statements after the end of each of the first three fiscal quarters of each fiscal year of
        the MLP, the MLP&#8217;s most recent quarterly report on Form 10-Q, which includes the consolidated financial statements of the MLP, as well as the financial statements of the Borrower, which will be provided as a separate document in addition to the
        Form 10-Q, all certified by one of the MLP&#8217;s Financial Officer as presenting fairly in all material respects the financial condition and results of operations of the MLP and its consolidated subsidiaries, including the Borrower, in accordance with
        GAAP consistently applied except for the lack of footnotes with respect to the Borrower;</font></div>
    <div>&#160;</div>
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    </div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">(c)</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="font-size: 10pt; font-family: 'Times New Roman';">concurrently
        with any delivery of financial statements under clause (a) or (b) above, a certificate of a Financial Officer of each of the Borrower and the MLP (i) certifying as to whether a Default has occurred and, if a Default has occurred, specifying the
        details thereof and any action taken or proposed to be taken with respect thereto, (ii) setting forth reasonably detailed calculations demonstrating compliance with Section 6.11 (including a reasonably detailed calculation of the Available Cash
        Netting Amount used to reduce Consolidated Debt as of the last day of the Rolling Period for which compliance with Section 6.11 is then being tested and specifying the Specified Redemption Indebtedness applicable to such Available Cash Netting
        Amount) and Section 6.12, (iii) stating whether any change in GAAP or in the application thereof has occurred since the date of the audited financial statements referred to in Section 3.04 and, if any such change has occurred, specifying the effect
        of such change on the financial statements accompanying such certificate, (iv) from and after the date of any accounting change in GAAP after the Fourth Amendment Effective Date requiring lease obligations to be recorded on a balance sheet of the
        MLP or any Restricted Subsidiary, specifying in a reasonable manner all Capital Lease Obligations of the MLP and its Restricted Subsidiaries, and (v) if the Borrower used the Available Cash Netting Amount to reduce Consolidated Debt in testing
        compliance with Section 6.11 as of last day of any of the five (5) consecutive Rolling Periods most recently ended, specifying for each such Rolling Period (A) the last day of such Rolling Period and the amount applied to reduce Consolidated Debt
        as of such date, (B) the Specified Redemption Indebtedness applicable to the Available Cash Netting Amount as of the last day of such Rolling Period, and (C) the principal amount of the Specified Redemption Indebtedness applicable to the Available
        Cash Netting Amount as of the last day of such Rolling Period actually Redeemed with such Available Cash Netting Amount during the period of five (5) consecutive fiscal quarters most recently ended, if any, and the date or dates of such Redemption
        (or if no Specified Redemption Indebtedness applicable to such Available Cash Netting Amount was Redeemed, including a statement to that effect), with all such information required in this clause (v) being presented in the form set forth on Exhibit
        F;</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">2.3</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';"><font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Amendment to Article VII</u></font>.&#160; Article VII is hereby amended by (i) deleting the word &#8220;or&#8221; at the end of clause (n), (ii) adding the word &#8220;or&#8221; at the end of clause (o), and (iii) adding a new clause (p) to read as follows:</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt; margin-right: 36pt; margin-left: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">(p)</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">if the
        Borrower used the Available Cash Netting Amount to reduce Consolidated Debt in testing compliance with Section 6.11 as of the last day of any Rolling Period, the MLP or any of its Restricted Subsidiaries shall have failed to Redeem the Specified
        Redemption Indebtedness applicable to such Available Cash Netting Amount during the Specified Redemption Period, in an aggregate principal amount equal to at least the Available Cash Netting Amount applied to reduce Consolidated Debt as of such
        day.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">2.4</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="font-size: 10pt; font-family: 'Times New Roman';"><font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Amendment to Exhibits</u></font>.&#160; The Credit Agreement is hereby amended by adding a new Exhibit F to read in the form of Exhibit F attached to this Ninth Amendment.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify;"><font style="font-size: 10pt; font-family: 'Times New Roman';">Section 3.</font>&#160;&#160;&#160;&#160;&#160;&#160; &#160;&#160; &#160; <font style="font-size: 10pt; font-family: 'Times New Roman';"><font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Conditions

            Precedent</u></font>.&#160; This Ninth Amendment shall not become effective until the date on which each of the following conditions is satisfied (or waived in accordance with Section 10.02) (the &#8220;<font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Ninth Amendment Effective Date</u></font>&#8221;):</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">3.1</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">The Administrative Agent shall have received from the
        Required Lenders, the Borrower, the MLP and the Subsidiary Guarantor, counterparts (in such number as may be requested by the Administrative Agent) of this Ninth Amendment signed on behalf of such Persons.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">3.2</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">The Administrative Agent and the Lenders shall have
        received all fees and other amounts due and payable, if any, in connection with this Ninth Amendment on or prior to the Ninth Amendment Effective Date, including, to the extent invoiced, reimbursement or payment of all out-of-pocket expenses
        required to be reimbursed or paid by the Borrower pursuant to the Credit Agreement.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">3.3</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';">The Administrative Agent shall have received such
        other documents as the Administrative Agent or special counsel to the Administrative Agent may reasonably request.</font></div>
    <div>&#160;</div>
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      <div style="text-align: center;" id="DSPFPageNumberArea"><font style="font-family: 'Times New Roman'; font-size: 8pt; font-weight: normal; font-style: normal;" id="DSPFPageNumber">4</font></div>
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    </div>
    <div style="text-align: justify; text-indent: 36pt; font-family: 'Times New Roman'; font-size: 10pt;">The Administrative Agent is hereby authorized and directed to declare this Ninth Amendment to be effective (and the Ninth Amendment Effective Date
      shall occur) when it has received documents confirming or certifying, to the satisfaction of the Administrative Agent, compliance with the conditions set forth in this Section 3 or the waiver of such conditions as permitted in Section 10.02, which
      must occur prior to 1:00 p.m., New York City time, on February 17, 2021 (and, in the event such conditions are not so satisfied or waived prior to such time, the Administrative Agent shall no longer be authorized to declare this Ninth Amendment to be
      effective (and the Ninth Amendment Effective Date shall not occur)).&#160; Such declaration shall be final, conclusive and binding upon all parties to the Credit Agreement for all purposes.</div>
    <div>&#160;</div>
    <div style="text-align: justify;"><font style="font-size: 10pt; font-family: 'Times New Roman';">Section 4.</font>&#160;&#160;&#160;&#160;&#160;&#160; &#160; &#160; &#160; <font style="font-size: 10pt; font-family: 'Times New Roman';"><font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Miscellaneous</u></font>.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">4.1</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';"><font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Confirmation</u></font>.&#160; The provisions of the Credit Agreement, as amended by this Ninth Amendment, shall remain in full force and effect following the effectiveness of this Ninth Amendment.</font></div>
    <div>&#160;</div>
    <div style="text-align: justify; text-indent: 36pt;"><font style="font-size: 10pt; font-family: 'Times New Roman';">4.2</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-size: 10pt; font-family: 'Times New Roman';"><font style="font-size: 10pt; font-family: 'Times New Roman';"><u>Ratification and Affirmation; Representations and Warranties</u></font>.&#160; Each Obligor hereby: (a) acknowledges the terms of this Ninth Amendment; (b) ratifies and affirms its obligations under, and acknowledges, renews and extends
        its continued liability under, each Loan Document to which it is a party and agrees that each Loan Document to which it is a party remains in full force and effect, except as expressly amended hereby, after giving effect to the amendments contained
        herein; (c) agrees that from and after the Ninth Amendment Effective Date, each reference to the Credit Agreement in the Subsidiary Guaranty and the other Loan Documents shall be deemed to be a reference to the Credit Agreement, as amended by this
        Ninth Amendment; and (d) represents and warrants to the Lenders that as of the date hereof, after giving effect to the terms of this Ninth Amendment:&#160; (i) all of the representations and warranties contained in each Loan Document to which it is a
        party are true and correct, unless such representations and warranties are stated to relate to a specific earlier date, in which case, such representations and warranties shall continue to be true and correct as of such earlier date and (ii) no
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    <div style="text-align: center;">[SIGNATURES BEGIN ON NEXT PAGE] </div>
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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          <td style="width: 45%; vertical-align: top;">
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt;">SIGNATURE PAGE TO NINTH AMENDMENT TO AMENDED</div>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt;">SIGNATURE PAGE TO NINTH AMENDMENT TO AMENDED</div>
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    <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt;">SIGNATURE PAGE TO NINTH AMENDMENT TO AMENDED</div>
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    <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt;">SIGNATURE PAGE TO NINTH AMENDMENT TO AMENDED</div>
    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt;">AND RESTATED 5-YEAR REVOLVING CREDIT AGREEMENT</div>
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    <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="vertical-align: top;" colspan="2">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="vertical-align: top;" colspan="2">&#160;</td>
        </tr>
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 5%; vertical-align: top;">
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          <td style="width: 45%; vertical-align: top; border-bottom: 2px solid black;">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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          <td style="width: 45%; vertical-align: top;">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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    <div><br>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt;">AND RESTATED 5-YEAR REVOLVING CREDIT AGREEMENT</div>
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    <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
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          <td style="vertical-align: top;" colspan="2">
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          </td>
        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="vertical-align: top;" colspan="2">&#160;</td>
        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 5%; vertical-align: top;">
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          <td style="width: 45%; vertical-align: top; border-bottom: 2px solid black;">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
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          <td style="width: 45%; vertical-align: top;">
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt;">SIGNATURE PAGE TO NINTH AMENDMENT TO AMENDED</div>
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    <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
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          <td style="vertical-align: top;" colspan="2">
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          </td>
        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="vertical-align: top;" colspan="2">&#160;</td>
        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 5%; vertical-align: top;">
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          <td style="width: 45%; vertical-align: top; border-bottom: 2px solid black;">
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          </td>
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        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 5%; vertical-align: top;">
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          <td style="width: 45%; vertical-align: top;">
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        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
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            <div style="text-align: justify; font-family: 'Times New Roman'; font-size: 10pt;">Title:</div>
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          <td style="width: 45%; vertical-align: top;">
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    <div><br>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt;">AND RESTATED 5-YEAR REVOLVING CREDIT AGREEMENT</div>
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    <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="vertical-align: top;" colspan="2">
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          </td>
        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="vertical-align: top;" colspan="2">&#160;</td>
        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 5%; vertical-align: top;">
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          <td style="width: 45%; vertical-align: top; border-bottom: 2px solid black;">
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        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 5%; vertical-align: top;">
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          <td style="width: 45%; vertical-align: top;">
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        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 5%; vertical-align: top;">
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          <td style="width: 45%; vertical-align: top;">
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    </table>
    <div><br>
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    <div><br>
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    <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="vertical-align: top;" colspan="2">
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        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="vertical-align: top;" colspan="2">
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          </td>
        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="vertical-align: top;" colspan="2">&#160;</td>
        </tr>
        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 5%; vertical-align: top;">
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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          <td style="width: 45%; vertical-align: top;">
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        <tr>
          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 5%; vertical-align: top;">
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          <td style="width: 45%; vertical-align: top;">
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    </table>
    <div><br>
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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          <td style="vertical-align: top;" colspan="2">&#160;</td>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">INFORMATION REGARDING AVAILABLE CASH NETTING AMOUNT AND SPECIFIED REDEMPTION INDEBTEDNESS</div>
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            <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">Rolling Period </div>
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            <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;"> Netting Amount</div>
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            <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">Specified</div>
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            <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">Date of </div>
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          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-right: 2px solid rgb(0, 0, 0);">&#160;</td>
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          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
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          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-right: 2px solid rgb(0, 0, 0);">&#160;</td>
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          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
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          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          <td style="width: 1%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-left: 2px solid rgb(0, 0, 0);" colspan="1">&#160;</td>
          <td style="width: 19%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0); border-right: 2px solid rgb(0, 0, 0);">&#160;</td>
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      <hr noshade="noshade" align="left" style="background-color: #000000; border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; margin: 0px auto 0px 0px; height: 2px; width: 15%; color: #000000; text-align: left;"></div>
    <sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">1</sup> Insert the date that is the last day of the 5 most recently ended Rolling Periods.
    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">2</sup> Insert the Available Cash Netting Amount applied to reduce Consolidated Debt in testing compliance with Section 6.11 as of last day of the applicable Rolling
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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">3</sup> Describe the Specified Redemption Indebtedness applicable to the Available Cash Netting Amount for such Rolling Period.</div>
    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">4</sup> Insert the aggregate amount of the Specified Redemption Indebtedness that has been Redeemed with the Available Cash Netting Amount for such Rolling Period, if
      any.</div>
    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">5</sup> Insert the date of such Redemption, if any.</div>
    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;"> <br>
    </div>
    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;"> <br>
    </div>
    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">
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</html>
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<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>3
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<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
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<TYPE>EX-101.DEF
<SEQUENCE>4
<FILENAME>ns-20210216_def.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber" xlink:label="EntityFileNumber" xlink:title="EntityFileNumber" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany" xlink:label="EntityEmergingGrowthCompany" xlink:title="EntityEmergingGrowthCompany" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityListingsLineItems" xlink:to="EntityEmergingGrowthCompany" xlink:title="definition: EntityListingsLineItems to EntityEmergingGrowthCompany" order="22.0" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:label="Security12bTitle" xlink:title="Security12bTitle" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol" xlink:label="TradingSymbol" xlink:title="TradingSymbol" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityListingsLineItems" xlink:to="TradingSymbol" xlink:title="definition: EntityListingsLineItems to TradingSymbol" order="27.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName" xlink:label="SecurityExchangeName" xlink:title="SecurityExchangeName" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityListingsLineItems" xlink:to="SecurityExchangeName" xlink:title="definition: EntityListingsLineItems to SecurityExchangeName" order="28.0" />
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  </link:definitionLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>5
<FILENAME>ns-20210216_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii"?>
<!--Generated by EDGARfilings PROfile 7.0.0.0 Broadridge-->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" />
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  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" />
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  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" />
  <link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
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    <link:label xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_CoverAbstract_lbl" xml:lang="en-US" id="dei_CoverAbstract_lbl">Cover [Abstract]</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1" xlink:label="EntityAddressAddressLine1" xlink:title="EntityAddressAddressLine1" />
    <link:label xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressAddressLine1_lbl" xml:lang="en-US" id="dei_EntityAddressAddressLine1_lbl">Entity Address, Address Line One</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine2" xlink:label="EntityAddressAddressLine2" xlink:title="EntityAddressAddressLine2" />
    <link:label xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressAddressLine2_lbl" xml:lang="en-US" id="dei_EntityAddressAddressLine2_lbl">Entity Address, Address Line Two</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityAddressAddressLine2" xlink:to="dei_EntityAddressAddressLine2_lbl" xlink:title="label: EntityAddressAddressLine2 to dei_EntityAddressAddressLine2_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine3" xlink:label="EntityAddressAddressLine3" xlink:title="EntityAddressAddressLine3" />
    <link:label xlink:type="resource" xlink:label="dei_EntityAddressAddressLine3_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressAddressLine3_lbl" xml:lang="en-US" id="dei_EntityAddressAddressLine3_lbl">Entity Address, Address Line Three</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityAddressAddressLine3" xlink:to="dei_EntityAddressAddressLine3_lbl" xlink:title="label: EntityAddressAddressLine3 to dei_EntityAddressAddressLine3_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" xlink:title="AmendmentFlag" />
    <link:label xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_AmendmentFlag_lbl" xml:lang="en-US" id="dei_AmendmentFlag_lbl">Amendment Flag</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl" xlink:title="label: AmendmentFlag to dei_AmendmentFlag_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode" xlink:label="CityAreaCode" xlink:title="CityAreaCode" />
    <link:label xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_CityAreaCode_lbl" xml:lang="en-US" id="dei_CityAreaCode_lbl">City Area Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CityAreaCode" xlink:to="dei_CityAreaCode_lbl" xlink:title="label: CityAreaCode to dei_CityAreaCode_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown" xlink:label="EntityAddressCityOrTown" xlink:title="EntityAddressCityOrTown" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCountry" xlink:label="EntityAddressCountry" xlink:title="EntityAddressCountry" />
    <link:label xlink:type="resource" xlink:label="dei_EntityAddressCountry_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressCountry_lbl" xml:lang="en-US" id="dei_EntityAddressCountry_lbl">Entity Address, Country</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" xlink:title="DocumentPeriodEndDate" />
    <link:label xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US" id="dei_DocumentPeriodEndDate_lbl">Document Period End Date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl" xlink:title="label: DocumentPeriodEndDate to dei_DocumentPeriodEndDate_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="EntityIncorporationStateCountryCode" xlink:title="EntityIncorporationStateCountryCode" />
    <link:label xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityIncorporationStateCountryCode_lbl" xml:lang="en-US" id="dei_EntityIncorporationStateCountryCode_lbl">Entity Incorporation, State or Country Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl" xlink:title="label: EntityIncorporationStateCountryCode to dei_EntityIncorporationStateCountryCode_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityListingsTable" xlink:label="EntityListingsTable" xlink:title="EntityListingsTable" />
    <link:label xlink:type="resource" xlink:label="dei_EntityListingsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityListingsTable_lbl" xml:lang="en-US" id="dei_EntityListingsTable_lbl">Entity Listings [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityListingsTable" xlink:to="dei_EntityListingsTable_lbl" xlink:title="label: EntityListingsTable to dei_EntityListingsTable_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber" xlink:label="LocalPhoneNumber" xlink:title="LocalPhoneNumber" />
    <link:label xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_LocalPhoneNumber_lbl" xml:lang="en-US" id="dei_LocalPhoneNumber_lbl">Local Phone Number</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl" xlink:title="label: LocalPhoneNumber to dei_LocalPhoneNumber_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode" xlink:label="EntityAddressPostalZipCode" xlink:title="EntityAddressPostalZipCode" />
    <link:label xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressPostalZipCode_lbl" xml:lang="en-US" id="dei_EntityAddressPostalZipCode_lbl">Entity Address, Postal Zip Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl" xlink:title="label: EntityAddressPostalZipCode to dei_EntityAddressPostalZipCode_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince" xlink:label="EntityAddressStateOrProvince" xlink:title="EntityAddressStateOrProvince" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl" xlink:title="label: EntityAddressStateOrProvince to dei_EntityAddressStateOrProvince_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:label="Security12bTitle" xlink:title="Security12bTitle" />
    <link:label xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_Security12bTitle_lbl" xml:lang="en-US" id="dei_Security12bTitle_lbl">Title of 12(b) Security</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Security12bTitle" xlink:to="dei_Security12bTitle_lbl" xlink:title="label: Security12bTitle to dei_Security12bTitle_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_NoTradingSymbolFlag" xlink:label="NoTradingSymbolFlag" xlink:title="NoTradingSymbolFlag" />
    <link:label xlink:type="resource" xlink:label="dei_NoTradingSymbolFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_NoTradingSymbolFlag_lbl" xml:lang="en-US" id="dei_NoTradingSymbolFlag_lbl">No Trading Symbol Flag</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NoTradingSymbolFlag" xlink:to="dei_NoTradingSymbolFlag_lbl" xlink:title="label: NoTradingSymbolFlag to dei_NoTradingSymbolFlag_lbl" />
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<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>6
<FILENAME>ns-20210216_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
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      contextRef="c20210216to20210216"
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    <dei:SecurityExchangeName
      contextRef="c20210216to20210216_StatementClassOfStockAxis_CommonUnitsMember"
      id="Fact_8f65bcff769a42e799a4f0ad19a99bf7">NYSE</dei:SecurityExchangeName>
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      contextRef="c20210216to20210216_StatementClassOfStockAxis_SeriesAFixedToFloatingRateCumulativeRedeemablePerpetualPreferredUnitsMember"
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<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<span style="display: none;">v3.20.4</span><table class="report" border="0" cellspacing="2" id="idm140037662599096">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Document and Entity Information<br></strong></div></th>
<th class="th"><div>Feb. 16, 2021</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityListingsLineItems', window );"><strong>Entity Listings [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Feb. 16,  2021<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">NuStar Energy L.P.<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">DE<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">001-16417<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">74-2956831<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">19003 IH-10 West<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">San Antonio<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">TX<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">78257<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">210<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">918-2000<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0001110805<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=ns_CommonUnitsMember', window );">Common units [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityListingsLineItems', window );"><strong>Entity Listings [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Common units<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">NS<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=ns_SeriesAFixedToFloatingRateCumulativeRedeemablePerpetualPreferredUnitsMember', window );">Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityListingsLineItems', window );"><strong>Entity Listings [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">NSprA<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=ns_SeriesBFixedToFloatingRateCumulativeRedeemablePerpetualPreferredUnitsMember', window );">Series B Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityListingsLineItems', window );"><strong>Entity Listings [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Series B Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">NSprB<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=ns_SeriesCFixedToFloatingRateCumulativeRedeemablePerpetualPreferredUnitsMember', window );">Series C Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityListingsLineItems', window );"><strong>Entity Listings [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Series C Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">NSprC<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
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<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
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</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityListingsLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityListingsLineItems</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Section 14a<br> -Number 240<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
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<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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