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        <ManagementAndGeneralAmt>117</ManagementAndGeneralAmt>
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        <FundraisingAmt>488</FundraisingAmt>
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        <ManagementAndGeneralAmt>580</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>5135</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>8576</ManagementAndGeneralAmt>
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        <TotalAmt>23433</TotalAmt>
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        <EOYAmt>1680261</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>-33651</ReconcilationRevenueExpnssAmt>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>1</FederalGrantAuditRequiredInd>
      <FederalGrantAuditPerformedInd>1</FederalGrantAuditPerformedInd>
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        <CurrentTaxYearMinus2YearsAmt>4022727</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3035986</CurrentTaxYearMinus1YearAmt>
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        <CurrentTaxYearMinus1YearAmt>3035986</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3300277</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus3YearsAmt>86</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>144</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>62</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>23</CurrentTaxYearAmt>
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        <CurrentTaxYearAmt>158</CurrentTaxYearAmt>
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        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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      <OtherLiabilitiesOrgGrp>
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        <Amt>24329</Amt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueSubtotalAmt>3337442</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>3337442</TotalRevenuePerForm990Amt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION PERFORMED AN EVALUATION OF UNCERTAIN TAX POSITIONS FOR THE YEAR ENDED DECEMBER 31, 2020, AND DETERMINED THAT THERE WERE NO MATTERS THAT WOULD REQUIRE RECOGNITION ON THE FINANCIAL STATEMENTS OR THAT MAY HAVE ANY EFFECT ON ITS TAX-EXEMPT STATUS.</ExplanationTxt>
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          <BusinessNameLine1Txt>THE CADMUS GROUP LLC FKA MEISTER CONSULTING GROUP INC</BusinessNameLine1Txt>
        </RecipientBusinessName>
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          <CityNm>WALTHAM</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02451</ZIPCd>
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      <RecipientTable>
        <RecipientBusinessName>
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      <RecipientTable>
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      <RecipientTable>
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          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20001</ZIPCd>
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      <RecipientTable>
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      <RecipientTable>
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          <BusinessNameLine1Txt>UNIVERSITY OF PUERTO RICO MAYAGUEZ</BusinessNameLine1Txt>
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          <CityNm>MOZAMBIQUE</CityNm>
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          <ZIPCd>00681</ZIPCd>
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      <RecipientTable>
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          <BusinessNameLine1Txt>NATIONAL LEAGUE OF CITIES INSTITUTE</BusinessNameLine1Txt>
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      <RecipientTable>
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        <PersonNm>ANDREA LUECKE PRESIDENT</PersonNm>
        <TitleTxt>&amp; EXECUTIVE DIRECTOR - UNTIL 11/2020</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>43208</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>9609</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>12929</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>234018</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>AS OF NOVEMBER 15, 2020, INTERSTATE RENEWABLE ENERGY COUNCIL (IREC) THROUGH ITS PRESIDENT AND CEO, LARRY SHERWOOD, PROVIDED DAY-TO-DAY MANAGEMENT SERVICES OVER THE OPERATION OF TSF IN CONSULTATION WITH THE TSF BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>A COPY OF THE DRAFT FEDERAL FORM 990 IS PROVIDED TO THE BOARD OF DIRECTORS FOR THEIR REVIEW PRIOR TO FILING WITH THE INTERNAL REVENUE SERVICE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL EMPLOYEES OF THE FOUNDATION MUST FOLLOW THE CONFLICT OF INTEREST SECTION OF THE EMPLOYEE HANDBOOK AT ALL TIMES AS THEY PERTAIN TO PROCUREMENTS. A CONFLICT OF INTEREST OCCURS WHEN THE OFFICIAL, EMPLOYEE OR DESIGNATED AGENT OF THE FOUNDATION, PARTNERS OF SUCH INDIVIDUALS, IMMEDIATE FAMILY MEMBERS, OR AN ORGANIZATION WHICH EMPLOYS OR INTENDS TO EMPLOY ANY OF THE ABOVE HAS A FINANCIAL OR OTHER INTEREST IN OR A TANGIBLE PERSONAL BENEFIT FROM A FIRM CONSIDERED FOR A CONTRACT. IN THE EVENT WHERE A BOARD MEMBER MAY HAVE A POTENTIAL CONFLICT OF INTEREST, THAT PARTICULAR BOARD MEMBER WILL BE ASKED TO LEAVE A MEETING DURING CONSIDERATION OF ANY TOPIC WITH WHICH THEY HAVE A CONFLICT OF INTEREST. THEIR EXCLUSION FROM THE DISCUSSION MAY BE PUBLISHED IN THE MINUTES AS PART OF THE RECORD OF THE MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION OF THE EXECUTIVE DIRECTOR IS FIXED BY THE BOARD OF DIRECTORS, WHO UTILIZE COMPENSATION STUDIES AS WELL AS CONTEMPORANEOUS SUBSTANTIATION FROM SIMILAR ASSOCIATIONS. THE BOARD OF DIRECTORS ISSUED AN RFP AND SELECTED A QUALIFIED CONSULTING FIRM TO PERFORM AN EXECUTIVE SALARY COMPENSATION STUDY IN 2018.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>CONSULTING SERVICES: PROGRAM SERVICE EXPENSES 404,252. MANAGEMENT AND GENERAL EXPENSES 31,835. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 436,087. PAYROLL FEES: PROGRAM SERVICE EXPENSES 5,796. MANAGEMENT AND GENERAL EXPENSES 528. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 6,324. OTHER PROESSIONAL FEES: PROGRAM SERVICE EXPENSES 2,555. MANAGEMENT AND GENERAL EXPENSES 233. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 2,788. RECRUITING: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 1,151. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 1,151.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
