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        <OtherCompensationAmt>118503</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SONIA C MENDONCA</PersonNm>
        <TitleTxt>SVP, GC &amp; CORP. SEC.</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>525713</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>68578</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JANET L SENA</PersonNm>
        <TitleTxt>SVP, EXTERNAL AFFAIRS</TitleTxt>
        <AverageHoursPerWeekRt>50.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>466514</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>65225</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KELLY HANSON</PersonNm>
        <TitleTxt>SVP AND CAO</TitleTxt>
        <AverageHoursPerWeekRt>50.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>414672</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>83824</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ANDREW G SHARP</PersonNm>
        <TitleTxt>VP AND CFO</TitleTxt>
        <AverageHoursPerWeekRt>55.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>315743</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>81001</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>HOWARD GUGEL</PersonNm>
        <TitleTxt>VP, ENGIN &amp; STNDRDS</TitleTxt>
        <AverageHoursPerWeekRt>45.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>314649</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>81041</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MECHELLE THOMAS</PersonNm>
        <TitleTxt>VP, COMPLIANCE</TitleTxt>
        <AverageHoursPerWeekRt>50.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>312161</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>81001</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>BRYAN PRESTON</PersonNm>
        <TitleTxt>VP, PEOPLE &amp; CULTURE</TitleTxt>
        <AverageHoursPerWeekRt>55.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>90116</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>8375</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MICHAEL WALKER</PersonNm>
        <TitleTxt>SENIOR ADVISOR</TitleTxt>
        <AverageHoursPerWeekRt>45.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>60276</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>STUART ELSTEIN</PersonNm>
        <TitleTxt>ASSOCIATE GENERAL COUNSEL</TitleTxt>
        <AverageHoursPerWeekRt>43.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>300071</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>53753</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ERIC T HARTUNG</PersonNm>
        <TitleTxt>E-ISAC DIRECTOR OF PERFORMANCE MANAGEMENT</TitleTxt>
        <AverageHoursPerWeekRt>50.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>287861</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>NINA JENKINS-JOHNSTON</PersonNm>
        <TitleTxt>ASSISTANT GENERAL COUNSEL</TitleTxt>
        <AverageHoursPerWeekRt>45.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>FRANK HIRST III</PersonNm>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <TotalReportableCompFromOrgAmt>7989097</TotalReportableCompFromOrgAmt>
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      <IndivRcvdGreaterThan100KCnt>26</IndivRcvdGreaterThan100KCnt>
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      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>BATTELLE PACIFIC NORTHWEST DIVISION</BusinessNameLine1Txt>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 84262</AddressLine1Txt>
            <CityNm>SEATTLE</CityNm>
            <StateAbbreviationCd>WA</StateAbbreviationCd>
            <ZIPCd>981245562</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CRISP DATA SHARING</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>PERSIDIO NETWORKED SOLUTIONS</BusinessNameLine1Txt>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 822169</AddressLine1Txt>
            <CityNm>PHILADELPHIA</CityNm>
            <StateAbbreviationCd>PA</StateAbbreviationCd>
            <ZIPCd>191822169</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>TECHNOLOGY PROVIDER</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>DELOITTE AND TOUCHE LLP</BusinessNameLine1Txt>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 844708</AddressLine1Txt>
            <CityNm>DALLAS</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>752844708</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CONSULTANT</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>64 DCGT OWNER LLC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 392833</AddressLine1Txt>
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            <StateAbbreviationCd>PA</StateAbbreviationCd>
            <ZIPCd>152519833</ZIPCd>
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        </ContractorAddress>
        <ServicesDesc>LANDLORD, DC</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>AGILE RESOURCES INC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 645425</AddressLine1Txt>
            <CityNm>PITTSBURGH</CityNm>
            <StateAbbreviationCd>PA</StateAbbreviationCd>
            <ZIPCd>152645425</ZIPCd>
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        </ContractorAddress>
        <ServicesDesc>CONTRACTOR AGENCY</ServicesDesc>
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      <CntrctRcvdGreaterThan100KCnt>43</CntrctRcvdGreaterThan100KCnt>
      <ProgramServiceRevenueGrp>
        <Desc>ASSESSMENTS</Desc>
        <BusinessCd>900099</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>72011373</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
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        <BusinessCd>900099</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>7661036</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>TESTING FEES</Desc>
        <BusinessCd>900099</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>1753104</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>SERVICE AND SOFTWARE</Desc>
        <BusinessCd>900099</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>289510</RelatedOrExemptFuncIncomeAmt>
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        <ExclusionAmt>5024</ExclusionAmt>
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      <OtherRevenueMiscGrp>
        <Desc>MISCELLANEOUS</Desc>
        <BusinessCd>900099</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>62855</RelatedOrExemptFuncIncomeAmt>
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      <TotalRevenueGrp>
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      <OtherExpensesGrp>
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        <EOYAmt>8471776</EOYAmt>
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        <EOYAmt>3975848</EOYAmt>
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        <EOYAmt>11562781</EOYAmt>
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        <EOYAmt>6446032</EOYAmt>
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        <DepreciationAmt>1163821</DepreciationAmt>
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      <EquipmentGrp>
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        <DepreciationAmt>17161157</DepreciationAmt>
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      <OtherLandBuildingsGrp>
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      <OtherAssetsOrgGrp>
        <Desc>DEFERRED COMPENSATION INVESTMENTS</Desc>
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      <OtherLiabilitiesOrgGrp>
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        <Amt>3779066</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>DEFERRED RENT</Desc>
        <Amt>1992968</Amt>
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        <Desc>INSURANCE RESERVE</Desc>
        <Amt>512821</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>INTERCOMPANY PAYABLES</Desc>
        <Amt>513</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>ACCURED RETIREMENT LIABILITIES</Desc>
        <Amt>160664</Amt>
      </OtherLiabilitiesOrgGrp>
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      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>81782902</TotalRevEtcAuditedFinclStmtAmt>
      <RevenueNotReportedAmt>0</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>81782902</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>81782902</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>82022807</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>-392771</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>-392771</ExpensesNotReportedAmt>
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      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>82415578</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION HAS RECEIVED A DETERMINATION LETTER FROM THE INTERNAL REVENUE SERVICE ("IRS") CONCLUDING THAT IT IS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(C)(6) OF THE IRC. THE CORPORATION IS SUBJECT TO A PROXY TAX RELATED TO NONDEDUCTIBLE LOBBYING AND POLITICAL EXPENSES INCURRED. THERE WAS NO PROXY TAX INCURRED IN 2021. THE CORPORATION RECOGNIZES THE TAX BENEFIT FROM AN UNCERTAIN TAX POSITION ONLY IF IT IS MORE LIKELY THAN NOT THAT THE TAX POSITION WILL BE SUSTAINED ON EXAMINATION BY THE TAXING AUTHORITY, BASED ON THE TECHNICAL MERITS OF THE POSITION. THERE WERE NO POSITIONS RECOGNIZED FOR THE YEAR ENDED DECEMBER 31, 2021 AND 2020. THE CORPORATION IS NO LONGER SUBJECT TO FEDERAL AND STATE TAX EXAMINATIONS BY THE RESPECTIVE TAXING AUTHORITIES FOR THE YEARS PRIOR TO 2017. TAX YEARS 2017 THROUGH 2021 REMAIN SUBJECT TO EXAMINATION BY MAJOR TAX JURISDICTIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>RECLASS OF UNREALIZED GAIN -392,771.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="RetDoc1040500001">
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        <RegionTxt>NORTH AMERICA</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>PROGRAM SERVICES</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>REGULATORY OBLIGATIONS</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>6826738</RegionTotalExpendituresAmt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>PROGRAM SERVICES</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>REGULATORY OBLIGATIONS</SpecificServicesProvidedTxt>
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      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>7054228</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>7054228</TotalSpentAmt>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>EXPENDITURES ARE ACCOUNTED FOR BASED UPON THE LOCATION OF THE ACTIVITIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>(1) COUNTRY - CANADA (2) COUNTRY - MEXICO</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III ACCOUNTING METHOD:</FormAndLineReferenceDesc>
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        <PersonNm>JAMES B ROBB</PersonNm>
        <TitleTxt>PRESIDENT AND CEO</TitleTxt>
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        <OtherCompensationFilingOrgAmt>904</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>30244</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>2087</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>307195</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KEN DEFONTES</PersonNm>
        <TitleTxt>CHAIRMAN</TitleTxt>
        <BaseCompensationFilingOrgAmt>175000</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
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        <TotalCompensationFilingOrgAmt>175000</TotalCompensationFilingOrgAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>FIRST-CLASS TRAVEL: UNDER NERC'S TRAVEL POLICY, TRUSTEES, OFFICERS, AND EMPLOYEES ARE GENERALLY REIMBURSED FOR ECONOMY CLASS FARES. UNDER CIRCUMSTANCES WHERE NO OTHER CLASS OF SERVICE IS AVAILABLE, OR IF A FLIGHT SEGMENT EXCEEDS FOUR HOURS IN DURATION, BUSINESS OR FIRST CLASS WILL BE REIMBURSED. TAX GROSS-UP PAYMENTS: GROSS UPS ARE PROVIDED ON PAYCHECKS FOR TAXES THAT ARE WITHHELD FOR GIFTCARDS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>IN 2015, NERC ESTABLISHED A 457(F) PLAN FOR EXECUTIVE OFFICERS. AWARDS CONTRIBUTED TO THE PLAN IN 2021 TOTALED $287,666. AWARDS VEST OVER TIME. SIX AWARDS VESTED IN 2021 AND WERE PAID: STAN HOPTROFF $17,214 AND $18,432; MARK G. LAUBY $37,212; SONIA C. MENDONCA $18,028; JAMES B. ROBB $28,018; JANET L. SENA $28,347. THE FOLLOWING OFFICERS PARTICIPATED IN THE PLAN DURING 2021: MANUEL J. CANCEL, HOWARD GUGEL, KELLY HANSON, STAN HOPTROFF, MARK G. LAUBY, SONIA C. MENDONCA, JAMES B. ROBB, JANET L. SENA, ANDREW G. SHARP, AND MECHELLE THOMAS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 4A, DESCRIPTION OF PROGRAM SERVICE:</FormAndLineReferenceDesc>
        <ExplanationTxt>SITUATION AWARENESS AND INFRASTRUCTURE SECURITY: THIS ACTIVITY INCLUDES THE MONITORING OF THE CONDITIONS OF THE BULK POWER SYSTEM AND PROVIDING LEADERSHIP COORDINATION, TECHNICAL EXPERTISE, AND ASSISTANCE TO THE INDUSTRY IN RESPONDING TO EVENTS AS NECESSARY, AS WELL AS ASSISTING IN THE DEVELOPMENT OF TOOLS AND OTHER SUPPORT SERVICES FOR THE BENEFIT OF RELIABILITY COORDINATORS AND OTHER SYSTEM OPERATORS TO ENHANCE RELIABILITY, OPERATIONS, AND PLANNING. ALSO INCLUDES THE COORDINATION OF ELECTRIC INDUSTRY ACTIVITIES TO PROMOTE CRITICAL INFRASTRUCTURE PROTECTION OF THE BULK POWER SYSTEM IN NORTH AMERICA BY TAKING A LEADERSHIP ROLE SO AS TO REDUCE VULNERABILITY AND IMPROVE MITIGATION AND PROTECTION OF THE ELECTRICITY SECTOR'S CRITICAL INFRASTRUCTURE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 4</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CURRENT VERSION OF THE BY-LAWS BECAME EFFECTIVE APRIL 5, 2021. THE MOST SIGNIFICANT CHANGE WAS THE ADDITION OF ONE MEMBERSHIP SECTOR. THE DEFINITION OF AN INDEPENDENT TRUSTEE WAS CLARIFIED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 4</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CURRENT VERSION OF THE BY-LAWS BECAME EFFECTIVE APRIL 5, 2021. THE MOST SIGNIFICANT CHANGE WAS THE ADDITION OF ONE MEMBERSHIP SECTOR. THE DEFINITION OF AN INDEPENDENT TRUSTEE WAS CLARIFIED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBERSHIP IN THE CORPORATION IS VOLUNTARY AND IS OPEN TO ANY PERSON OR ENTITY THAT HAS AN INTEREST IN THE RELIABLE OPERATION OF THE NORTH AMERICAN BULK POWER SYSTEM AND THAT REGISTERS WITH THE CORPORATION AS A MEMBER, MAINTAINS ITS REGISTRATION IN ACCORDANCE WITH THE BYLAWS, AND COMPLIES WITH THE OTHER CONDITIONS AND OBLIGATIONS OF MEMBERSHIP AS SPECIFIED IN THE BYLAWS. MEMBERSHIP IN A REGIONAL ENTITY SHALL NOT BE A CONDITION FOR MEMBERSHIP IN THE CORPORATION. THE SECRETARY OF THE CORPORATION SHALL MAINTAIN A ROSTER OF THE MEMBERS OF THE CORPORATION. MEMBERS DO NOT SHARE IN THE PROFITS OR REVENUES OF THE CORPORATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>INDEPENDENT TRUSTEES ARE ELECTED BY THE MEMBER REPRESENTATIVES COMMITTEE, WHICH IS ELECTED BY THE MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBER REPRESENTATIVES COMMITTEE AND THE BOARD OF TRUSTEES MUST EACH APPROVE CHANGES TO THE BYLAWS. THE BOARD APPOVES CHANGES TO THE ORGANIZATION'S RULES OF PROCEDURE. THESE DOCUMENTS ARE SUBJECT TO REVIEW AND APPROVAL BY THE UNITED STATES FEDERAL ENERGY REGULATORY COMMISSION ("FERC"). DECISIONS REGARDING ENFORCEMENT MATTERS FOR U.S ENTITIES ARE SUBJECT TO REVIEW AND APPROVAL BY FERC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MUST USE THE FOLLOWING PROCESS FOR PREPARATION AND REVIEW OF ITS IRS FORM 990: (1) EACH YEAR, AN INDEPENDENT CPA FIRM PREPARES A DRAFT OF THE FORM 990, WORKING WITH THE CHIEF FINANCIAL OFFICER (CFO). THE CFO MAY ALSO ENGAGE THE SERVICES OF OUTSIDE COUNSEL IN PREPARING THE DRAFT FORM 990. (2) PRIOR TO FILING THE FORM 990 EACH YEAR, THE CFO, CORPORATE CONTROLLER, CHIEF ADMINISTRATIVE OFFICER AND GENERAL COUNSEL REVIEW THE DRAFT FORM 990. (3) PRIOR TO FILING THE FORM 990 EACH YEAR, THE DRAFT FORM 990 IS SENT TO ALL MEMBERS OF THE BOARD OF TRUSTEES FOR REVIEW. THE FINANCE AND AUDIT COMMITTEE (FAC) AND THE CORPORATE GOVERNANCE AND HUMAN RESOURCES COMMITTEE (CGHRC) INCLUDE THE REVIEW OF THE DRAFT FORM 990 ON A MEETING AGENDA, WITH THE FAC REVIEW FOCUSED ON THE FINANCIAL ASPECTS AND THE CGHRC FOCUSED ON THE CORPORATE GOVERNANCE ASPECTS. (4) THE MINUTES OF THE MEETINGS OF THE FAC AND THE CGHRC RECORD THE TIMING AND NATURE OF THAT REVIEW. (5) THE CFO PREPARES A MEMORANDUM FOR THE FILE EACH YEAR DESCRIBING THE TIMING, NATURE, AND INDIVIDUALS INVOLVED IN THE PREPARATION AND REVIEW OF THE FORM 990.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S ETHICS AND CONFLICTS OF INTEREST POLICY FOR TRUSTEES, OFFICERS, AND EMPLOYEES REQUIRE ANNUAL WRITTEN DISCLOSURE FROM ALL EMPLOYEES, AND ALL TRUSTEES, OF ANY CONFLICT OF INTEREST. THE ANNUAL FORMS ARE REVIEWED BY THE ORGANIZATION'S GENERAL COUNSEL AND OTHER LEGAL STAFF AND RECUSALS OR WAIVERS ARE PUT IN PLACE, WHERE NECESSARY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>NORTH AMERICAN ELECTRIC RELIABILITY CORPORATION (NERC) USES THE FOLLOWING PROCESSES FOR DETERMINING THE COMPENSATION OF INDEPENDENT TRUSTEES, THE CHIEF EXECUTIVE OFFICER, OTHER OFFICERS, AND KEY EMPLOYEES: A) TRUSTEE COMPENSATION - CONSISTENT WITH ITS MANDATE AND NERC'S GOVERNANCE GUIDELINES, AS AMENDED FROM TIME TO TIME, THE CGHRC ANNUALLY REVIEWS THE COMPENSATION PLAN FOR INDEPENDENT TRUSTEES. THE OBJECTIVE OF THE COMMITTEE'S REVIEW IS TO ASSURE THAT NERC IS ABLE TO ATTRACT AND RETAIN INDIVIDUALS WHO HAVE THE NECESSARY SKILLS, EXPERIENCE, PERSONAL CHARACTERISTICS AND COMMITMENT TO BE AN EFFECTIVE TRUSTEE, TAKING INTO ACCOUNT, IN PARTICULAR, THE WORKLOAD OF TRUSTEES, THE ALTERNATIVE OPPORTUNITIES AVAILABLE TO THOSE NERC WISHES TO ATTRACT AND RETAIN, AND THE STRINGENT CONFLICT-OF-INTEREST PROVISIONS GOVERNING NERC TRUSTEES. IN CONDUCTING THE REVIEW OF COMPENSATION, THE CGHRC EVALUATES THE AMOUNT OF WORK AND LEVEL OF RESPONSIBILITY TRUSTEES ARE BEING ASKED TO UNDERTAKE AND, FROM TIME TO TIME, BUT NO LESS THAN EVERY THREE YEARS, EXAMINES MARKET DATA WITH RESPECT TO THE COMPENSATION OF THE MEMBERS OF THE GOVERNING BOARDS OF OTHER RELEVANT ORGANIZATIONS UTILIZING AN INDEPENDENT COMPENSATION CONSULTANT. SUCH MARKET DATA MAY INCLUDE AVAILABLE COMPENSATION DATA FROM NERC'S REGIONAL ENTITIES, REGIONAL TRANSMISSION OPERATORS (RTO), INDEPENDENT SYSTEM OPERATORS (ISO), INVESTOR OWNED UTILITIES (IOU) (MEETING SUCH CHARACTERISTICS AS ARE APPROVED BY THE COMMITTEE IN CONSULTATION WITH THE INDEPENDENT COMPENSATION CONSULTANT) AND A GENERAL INDUSTRY PEER GROUP (AS APPROVED BY THE COMMITTEE IN CONSULTATION WITH THE INDEPENDENT COMPENSATION CONSULTANT). B) CHIEF EXECUTIVE AND OTHER OFFICER COMPENSATION - THE ANNUAL COMPENSATION, INCLUDING INCENTIVE COMPENSATION, OF THE CEO IS DETERMINED BY THE BOARD OF TRUSTEES, AFTER REVIEW AND RECOMMENDATION BY THE CGHRC. THE COMMITTEE AND BOARD CONSIDER MARKET DATA FOR PEER GROUP ORGANIZATIONS PROVIDED BY AN INDEPENDENT CONSULTANT, AS WELL AS THE DEGREE TO WHICH THE ORGANIZATION AND CEO HAVE ACHIEVED ESTABLISHED ANNUAL GOALS. THE DECISIONS OF THE COMMITTEE AND BOARD ARE DOCUMENTED AND KEPT ON FILE IN THE HUMAN RESOURCES DEPARTMENT. THE ANNUAL COMPENSATION, INCLUDING INCENTIVE COMPENSATION, OF OTHER OFFICERS IS REVIEWED, DETERMINED AND DOCUMENTED IN A SIMILAR FASHION, EXCEPT THAT THE FINAL COMPENSATION DETERMINATIONS ARE, UPON RECOMMENDATION OF THE CEO, APPROVED BY THE CGHRC, RATHER THAN THE BOARD OF TRUSTEES. C) KEY EMPLOYEES - THE ANNUAL COMPENSATION OF OTHER KEY EMPLOYEES IS DETERMINED BY THE CEO, AFTER CONSULTATION WITH THE CGHRC CONCERNING OVERALL CORPORATE COMPENSATION STRUCTURE, TAKING ACCOUNT OF THE DEGREE TO WHICH ORGANIZATIONAL AND PERSONAL GOALS HAVE BEEN ACHIEVED. THE CEO ALSO USES COMPARABILITY DATA PROVIDED BY AN INDEPENDENT CONSULTANT IN THESE DETERMINATIONS. THE RECOMMENDATIONS OF THE CEO ARE DOCUMENTED AND KEPT ON FILE IN THE HUMAN RESOURCES DEPARTMENT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S BYLAWS, GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND OTHER CORPORATE POLICIES, AND DETAILED BUDGET ARE ALL POSTED AND AVAILABLE FOR PUBLIC INSPECTION ON ITS WEBSITE. THE ORGANIZATION PROVIDES COPIES OF ITS AUDITED FINANCIAL STATEMENTS UPON REQUEST, AND FILES SUCH STATEMENTS WITH FERC. THE FORM 990 IS ALSO AVAILABLE ON GUIDESTAR.ORG AND BY REQUEST TO THE ORGANIZATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER CONSULTANTS 8,439,069.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>RECLASS OF UNREALIZED GAIN 392,771.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
