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      <Desc>TECHNICAL PROGRAMS, SEMINARS AND WORKSHOPS - AS THE LEADING SOURCE OF WATER QUALITY EXPERTISE, WEF IS COMMITTED TO ADVANCING THE PROFESSIONAL AND WORKFORCE DEVELOPMENT OF THE WATER SECTOR THROUGH EDUCATIONAL SEMINARS AND WORKSHOPS THAT FOCUS ON ENVIRONMENTAL, SUSTAINABILITY, AND PUBLIC HEALTH TOPICS. WEF PROVIDES EDUCATION TO WATER PROFESSIONALS FROM OVER 70 COUNTRIES AT WEFTEC, AS WELL AS AT WEF'S SPECIALTY CONFERENCES. WEF'S EDUCATIONAL CONTENT INCLUDES ALL AREAS OF WATER RESOURCES MANAGEMENT, INCLUDING UTILITY MANAGEMENT AND OPERATIONS, COLLECTION SYSTEMS, STORMWATER, WATER AND WASTEWATER TREATMENT, AND BIOSOLIDS. WEF'S COMMITMENT TO THE SUSTAINABLE DEVELOPMENT GOALS FOCUS ON SAFE, SUSTAINABLE ACCESS TO CLEAN WATER AND SANITATION, INNOVATION AND A CIRCULAR ECONOMY. IN RESPONSE TO THE 2020 PANDEMIC, WEF PROVIDED IN-DEPTH EDUCATION ON BIOLOGICAL HAZARDS TO WASTEWATER OPERATORS THROUGH VIRTUAL WORKSHOPS AND PUBLIC HEALTH COMMUNICATIONS PLATFORMS, AND PROVIDED A FREE UPDATE TO A MANUAL OF PRACTICE ON SAFETY AND SECURITY OF WATER RESOURCE RECOVERY FACILITIES.</Desc>
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        <PersonNm>LYNN BROADDUS</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JAMIE EICHENBERGER</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JACQUELINE A JARRELL</PersonNm>
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        <PersonNm>THOMAS KUNETZ</PersonNm>
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        <PersonNm>IFETAYO VENNER</PersonNm>
        <TitleTxt>TRUSTEE, VICE PRESIDENT (BEG 10/20)</TitleTxt>
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        <PersonNm>KEITH HOBSON</PersonNm>
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        <PersonNm>AIMEE KILLEEN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>GUSTAVO GALLO-CHACON</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>HOWARD CARTER</PersonNm>
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        <PersonNm>JOHN TROFATTER</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MARK POLING</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>RAJENDRA BHATTARAI</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SHELLIE CHARD</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PENNY YOUNG</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>WALTER MARLOWE</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>BARRY LINER</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CLAUDIO TERNIEDEN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>LISA RUANE</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>LYNN THOMSON</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SACHA CAREY</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>TIMOTHY WILLIAMS</PersonNm>
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          <BusinessName>
            <BusinessNameLine1Txt>FONTEVA LLC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>4420 N FAIRFAX DR SUITE 500</AddressLine1Txt>
            <CityNm>ARLINGTON</CityNm>
            <StateAbbreviationCd>VA</StateAbbreviationCd>
            <ZIPCd>22203</ZIPCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>PERIS COMPANIES</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>282 N WASHINGTON STREET</AddressLine1Txt>
            <CityNm>FALLS CHURCH</CityNm>
            <StateAbbreviationCd>VA</StateAbbreviationCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>FREEMAN</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1600 VICEROY DR 100</AddressLine1Txt>
            <CityNm>DALLAS</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
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          <USAddress>
            <AddressLine1Txt>60 WEST STREET SUITE 300</AddressLine1Txt>
            <CityNm>ANNAPOLIS</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>21401</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>MEMBERSHIP</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>PERSONIFY</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>6500 RIVER PLACE BLVD</AddressLine1Txt>
            <CityNm>AUSTIN</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>78730</ZIPCd>
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      <GovernmentGrantsAmt>2439507</GovernmentGrantsAmt>
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      <TotalContributionsAmt>3322332</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>BUSINESS INTERRUPTION INCOME</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>10595568</TotalRevenueColumnAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP DUES</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>3576157</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>3576157</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>TECHNICAL PROG &amp; SEM</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1893589</TotalRevenueColumnAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>PUBLICATIONS &amp; SUBS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1714062</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>231944</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>1482118</UnrelatedBusinessRevenueAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>ANNUAL CONFERENCE</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1114410</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>788335</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>326075</UnrelatedBusinessRevenueAmt>
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      <TotalOthProgramServiceRevGrp>
        <TotalRevenueColumnAmt>495214</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>70417</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>315843</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>108954</ExclusionAmt>
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      <TotalProgramServiceRevenueAmt>19389000</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>331825</TotalRevenueColumnAmt>
        <ExclusionAmt>331825</ExclusionAmt>
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      <RoyaltiesRevenueGrp>
        <TotalRevenueColumnAmt>160904</TotalRevenueColumnAmt>
        <ExclusionAmt>160904</ExclusionAmt>
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      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>12324636</SecuritiesAmt>
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        <TotalRevenueColumnAmt>668892</TotalRevenueColumnAmt>
        <ExclusionAmt>668892</ExclusionAmt>
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        <Desc>MISCELLANEOUS REVENUE</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>129197</TotalRevenueColumnAmt>
        <ExclusionAmt>129197</ExclusionAmt>
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      <OtherRevenueMiscGrp>
        <Desc>MANAGEMENT FEES</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>25000</TotalRevenueColumnAmt>
        <ExclusionAmt>25000</ExclusionAmt>
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        <ExclusionAmt>1424772</ExclusionAmt>
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      <GrantsToDomesticOrgsGrp>
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        <ProgramServicesAmt>34250</ProgramServicesAmt>
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        <ProgramServicesAmt>39000</ProgramServicesAmt>
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        <ProgramServicesAmt>39439</ProgramServicesAmt>
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        <ProgramServicesAmt>527885</ProgramServicesAmt>
        <ManagementAndGeneralAmt>365463</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>4372993</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3046779</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>202031</ProgramServicesAmt>
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        <ProgramServicesAmt>581619</ProgramServicesAmt>
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        <ProgramServicesAmt>357367</ProgramServicesAmt>
        <ManagementAndGeneralAmt>240688</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>22536</ProgramServicesAmt>
        <ManagementAndGeneralAmt>85192</ManagementAndGeneralAmt>
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      <FeesForServicesAccountingGrp>
        <TotalAmt>43166</TotalAmt>
        <ManagementAndGeneralAmt>43166</ManagementAndGeneralAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
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        <ManagementAndGeneralAmt>46048</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>648312</ProgramServicesAmt>
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        <ProgramServicesAmt>145648</ProgramServicesAmt>
        <ManagementAndGeneralAmt>104113</ManagementAndGeneralAmt>
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      <OfficeExpensesGrp>
        <TotalAmt>871852</TotalAmt>
        <ProgramServicesAmt>688887</ProgramServicesAmt>
        <ManagementAndGeneralAmt>182965</ManagementAndGeneralAmt>
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      <InformationTechnologyGrp>
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        <ProgramServicesAmt>796279</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1026993</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>11472</ProgramServicesAmt>
        <ManagementAndGeneralAmt>5343</ManagementAndGeneralAmt>
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      <OccupancyGrp>
        <TotalAmt>356091</TotalAmt>
        <ProgramServicesAmt>8965</ProgramServicesAmt>
        <ManagementAndGeneralAmt>347126</ManagementAndGeneralAmt>
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      <TravelGrp>
        <TotalAmt>48410</TotalAmt>
        <ProgramServicesAmt>15541</ProgramServicesAmt>
        <ManagementAndGeneralAmt>32869</ManagementAndGeneralAmt>
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      <ConferencesMeetingsGrp>
        <TotalAmt>608023</TotalAmt>
        <ProgramServicesAmt>553178</ProgramServicesAmt>
        <ManagementAndGeneralAmt>54845</ManagementAndGeneralAmt>
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      <InterestGrp>
        <TotalAmt>64522</TotalAmt>
        <ManagementAndGeneralAmt>64522</ManagementAndGeneralAmt>
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      <DepreciationDepletionGrp>
        <TotalAmt>824971</TotalAmt>
        <ProgramServicesAmt>65573</ProgramServicesAmt>
        <ManagementAndGeneralAmt>759398</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>259111</ProgramServicesAmt>
        <ManagementAndGeneralAmt>257512</ManagementAndGeneralAmt>
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        <Desc>UBIT</Desc>
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        <ManagementAndGeneralAmt>20006</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>PUBLICATIONS PRODUCTION</Desc>
        <TotalAmt>954064</TotalAmt>
        <ProgramServicesAmt>507673</ProgramServicesAmt>
        <ManagementAndGeneralAmt>446391</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>PLAQUES AND AWARDS</Desc>
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        <ProgramServicesAmt>77723</ProgramServicesAmt>
        <ManagementAndGeneralAmt>16681</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>DUES AND SUBSCRIPTIONS</Desc>
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        <ManagementAndGeneralAmt>20779</ManagementAndGeneralAmt>
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      <AllOtherExpensesGrp>
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        <ProgramServicesAmt>3912345</ProgramServicesAmt>
        <ManagementAndGeneralAmt>-3776010</ManagementAndGeneralAmt>
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      <TotalFunctionalExpensesGrp>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
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        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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        <CurrentTaxYearMinus1YearAmt>1490920</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3322332</CurrentTaxYearAmt>
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        <CurrentTaxYearAmt>17874230</CurrentTaxYearAmt>
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      <SubstAndDsqlfyPrsnsTotGrp>
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      <Post1975UBTIGrp>
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        <CurrentTaxYearMinus2YearsAmt>108599</CurrentTaxYearMinus2YearsAmt>
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      <InvestmentIncomePYPct>0.02280</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, PART III, LINE 12, EXPLANATION OF OTHER INCOME:</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER INCOME - 2016 AMOUNT: $ 8,268. 2017 AMOUNT: $ 109,238. 2018 AMOUNT: $ 108,599. 2019 AMOUNT: $ 64,091. 2020 AMOUNT: $ 154,197.</ExplanationTxt>
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          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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      <TotalLobbyingExpendGrp>
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      <OtherExemptPurposeExpendGrp>
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      <TotalExemptPurposeExpendGrp>
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      <LobbyingNontaxableAmountGrp>
        <FilingOrganizationsTotalAmt>1000000</FilingOrganizationsTotalAmt>
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      <GrassrootsNontaxableGrp>
        <FilingOrganizationsTotalAmt>250000</FilingOrganizationsTotalAmt>
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      <TotLbbyngGrassrootMnsNonTxGrp>
        <FilingOrganizationsTotalAmt>0</FilingOrganizationsTotalAmt>
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      <TotLbbyExpendMnsLbbyngNonTxGrp>
        <FilingOrganizationsTotalAmt>0</FilingOrganizationsTotalAmt>
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      <AvgLobbyingNontaxableAmountGrp>
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        <CurrentYearMinus1Amt>1000000</CurrentYearMinus1Amt>
        <CurrentYearAmt>1000000</CurrentYearAmt>
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        <CurrentYearMinus2Amt>51576</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>36261</CurrentYearMinus1Amt>
        <CurrentYearAmt>17877</CurrentYearAmt>
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      <AvgGrassrootsNontaxableGrp>
        <CurrentYearMinus3Amt>250000</CurrentYearMinus3Amt>
        <CurrentYearMinus2Amt>250000</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>250000</CurrentYearMinus1Amt>
        <CurrentYearAmt>250000</CurrentYearAmt>
        <TotalAmt>1000000</TotalAmt>
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      <GrassrootsCeilingAmt>1500000</GrassrootsCeilingAmt>
      <AvgGrassrootsLobbyingExpendGrp>
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        <CurrentYearMinus2Amt>854</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>1985</CurrentYearMinus1Amt>
        <CurrentYearAmt>1461</CurrentYearAmt>
        <TotalAmt>7763</TotalAmt>
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        <BookValueAmt>792248</BookValueAmt>
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      <BuildingsGrp>
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        <BookValueAmt>422235</BookValueAmt>
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      <LeaseholdImprovementsGrp>
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        <BookValueAmt>1885602</BookValueAmt>
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      <EquipmentGrp>
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        <Desc>CAPITAL LEASE OBLIGATIONS</Desc>
        <Amt>147479</Amt>
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        <Desc>DEFERRED COMPENSATION</Desc>
        <Amt>723710</Amt>
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      <RevenueNotReportedFinclStmtAmt>-140675</RevenueNotReportedFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>FOREIGN RECIPIENTS OF WEF'S GRANTS/AWARDS ARE ITS INTERNATIONAL MEMBER ASSOCIATIONS AND THEIR STUDENT CHAPTERS. WHEN DISBURSING A DONATION/AWARD, WEF PROVIDES A LETTER STATING THE NATURE OF FUNDING AND STIPULATIONS AS TO THE USE OF FUNDS WHICH ARE TO BE FOLLOWED BY THE AWARDEE. WEF ALSO RECEIVES AND REVIEWS A QUARTERLY ACTIVITY REPORT SENT BY CANADIAN WATER &amp; WASTEWATER ASSOCIATION, A RECIPIENT OF WEF'S ANNUAL CONTRIBUTION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III ACCOUNTING METHOD:</FormAndLineReferenceDesc>
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          <CityNm>DENVER</CityNm>
          <StateAbbreviationCd>CO</StateAbbreviationCd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>WHEN DISBURSING A DONATION/AWARD, WEF PROVIDES A LETTER STATING THE NATURE OF FUNDING AND STIPULATIONS AS TO THE USE OF FUNDS WHICH ARE TO BE FOLLOWED BY THE AWARDEE. WEF STAYS IN CONTACT WITH THE AWARD RECIPIENT TO ENSURE THAT THE FUNDS ARE USED FOR THE INTENDED PURPOSES. ONCE A SCHOLARSHIP RECIPIENT HAS BEEN NAMED, WEF VERIFIES WITH THE SCHOOL THAT THE STUDENT IS ENROLLED FOR THE FALL SEMESTER, THEN AGAIN VERIFIES THE ENROLLMENT PRIOR TO SENDING THE CHECK TO THE SCHOOL. IF THE STUDENT FAILS TO ATTEND, THE REFUND OF TUITION (SCHOLARSHIP) PAID BY WEF IS REFUNDED TO WEF. A NEW RECIPIENT IS CHOSEN EACH YEAR, THUS THIS PROCESS HAS TO BE REPEATED EACH YEAR. THE SCHOLARSHIP IS PAID DIRECTLY TO THE SCHOOL TO COVER TUITION COSTS. IF SCHOLARSHIP EXCEEDS TUITION COSTS, STUDENT HAS OPTION TO RECEIVE REMAINING SCHOLARSHIP FUNDS AS A TAXABLE DISTRIBUTION.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>1</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>WALTER MARLOWE</PersonNm>
        <TitleTxt>SEC AND EXEC DIR</TitleTxt>
        <BaseCompensationFilingOrgAmt>318347</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>21609</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>26364</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>30567</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>396887</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>TIMOTHY WILLIAMS</PersonNm>
        <TitleTxt>FORMER DEPUTY EXEC DIR (THRU 08/20)</TitleTxt>
        <BaseCompensationFilingOrgAmt>131921</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>108242</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>13251</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>22217</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>275631</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>PENNY YOUNG</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>175499</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>22891</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>17066</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>5373</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>220829</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>BARRY LINER</PersonNm>
        <TitleTxt>CHIEF TECHNICAL OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>147058</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>2252</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>13089</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>33460</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>195859</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>CLAUDIO TERNIEDEN</PersonNm>
        <TitleTxt>SR. DIRECTOR, GOV AFFAIRS &amp; SP</TitleTxt>
        <BaseCompensationFilingOrgAmt>136323</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>897</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12177</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>25218</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>174615</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LISA RUANE</PersonNm>
        <TitleTxt>SR. DIRECTOR, ASSOCIATION ENGAGEMENT</TitleTxt>
        <BaseCompensationFilingOrgAmt>135563</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>245</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>11824</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>21902</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>169534</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SACHA CAREY</PersonNm>
        <TitleTxt>SR. DIRECTOR, EXHIBITIONS</TitleTxt>
        <BaseCompensationFilingOrgAmt>147754</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>698</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12501</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>6207</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>167160</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LYNN THOMSON</PersonNm>
        <TitleTxt>SR. DIRECTOR, IT</TitleTxt>
        <BaseCompensationFilingOrgAmt>137055</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>1414</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>11777</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>10081</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>160327</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4A</FormAndLineReferenceDesc>
        <ExplanationTxt>TIMOTHY WILLIAMS RECEIVED A SEVERANCE PAYMENT OF $97,960.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>WEF HAS INDIVIDUAL AND CORPORATE MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>WEF OFFICERS AND BOARD OF TRUSTEE NOMINEES SHALL BE RECOMMENDED BY THE WEF NOMINATING SUBCOMMITTEE, APPROVED BY THE BOARD, AND CONFIRMED BY THE HOUSE OF DELEGATES AS SO DESCRIBED IN THIS CONSTITUTION AND BYLAWS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>ANY PROPOSED CHANGES TO THE WEF ARTICLES OF INCORPORATION OR CONSTITUTION AND BYLAWS MUST BE RECOMMENDED BY THE BOARD OF TRUSTEES AND MUST ALSO BE RATIFIED BY A QUORUM OF VOTING MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS DRAFTED BY WEF'S OUTSIDE AUDIT FIRM WITH INFORMATION AND INPUT FROM WEF'S EXECUTIVE DIRECTOR AND CHIEF FINANCIAL OFFICER. THE DRAFT 990 IS REVIEWED BY WEF'S TREASURER (AUDIT COMMITTEE CHAIR), EXECUTIVE DIRECTOR AND CHIEF FINANCIAL OFFICER FOR ACCURACY. ONCE THIS TEAM HAS APPROVED THE DRAFT 990, IT IS FILED WITH THE IRS. THE FORM 990 IS THEN POSTED TO THE BOARD OF TRUSTEES' WEBSITE FOR ITS REVIEW AND REFERENCE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH NEW BOARD TRUSTEE IS ORIENTED ON THE WEF CONFLICT OF INTEREST POLICY. EVERY TRUSTEE SIGNS A STATEMENT ANNUALLY ACKNOWLEDGING THE POLICY. AT THE BEGINNING OF EVERY BOARD MEETING, THE BOARD MEMBERS ARE REMINDED OF THEIR RESPONSIBILITY TO ACKNOWLEDGE CONFLICTS OF INTEREST WHEN THE AGENDA IS BEING REVIEWED. EACH MEMBER OF THE BOARD OF TRUSTEES IS REQUIRED TO DISCLOSE "OTHER INTERESTS," AS DEFINED IN THE POLICY, ANNUALLY AND MORE FREQUENTLY IF OTHER INTERESTS ARISE. THE BOARD OR DELEGATED REPRESENTATIVES OF THE BOARD MUST DECIDE WHAT, IF ANY, CORRECTIVE MEASURES TO TAKE IN RESPONSE TO DISCLOSURES OF OTHER INTERESTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>WEF PARTICIPATES IN SEVERAL SALARY SURVEYS IN THE WASHINGTON, DC AREA. SURVEYS AND DATA ARE RECEIVED AND REVIEWED TO INFORM A SALARY STRUCTURE AND TO MAKE COMPENSATION RECOMMENDATIONS. THE EXECUTIVE DIRECTOR'S COMPENSATION IS REVIEWED BY THE BOARD OF TRUSTEES. DATA FOR WEF KEY EMPLOYEES ARE REVIEWED BY THE EXECUTIVE DIRECTOR, HUMAN RESOURCES DIRECTOR AND LEADERSHIP STAFF.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>WEF'S FINANCIAL INFORMATION IS AVAILABLE ON THE 990 AND POSTED ON THE INTERNET THROUGH INFORMATION SOURCES SUCH AS GUIDESTAR. WEF'S POLICY ALSO MAKES COPIES OF WEF'S DOCUMENTS AVAILABLE TO DIRECT REQUESTS MADE TO WEF AT ITS OFFICE. WEF'S CONSTITUTION AND BYLAWS ARE PRINTED ANNUALLY AS PART OF A BOARD RESOURCE GUIDE AND ARE POSTED ON WEF'S WEBSITE. WEF VIEWS THESE AS PUBLIC DOCUMENTS AND WILL PROVIDE THEM TO ANY INTERESTED PARTY WHO SEEKS THEM. THERE HAVE BEEN VERY FEW, IF ANY, REQUESTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AUDIT OVERSIGHT PROCESS HAS REMAINED UNCHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
