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      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>0</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>SMITHBUCKLIN CORPORATION</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>2001 K STREET NEW 3RD FL NORTH</AddressLine1Txt>
            <CityNm>WASHINGTON</CityNm>
            <StateAbbreviationCd>DC</StateAbbreviationCd>
            <ZIPCd>20006</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>MANAGEMENT SERVICES</ServicesDesc>
        <CompensationAmt>1461118</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>PRESTIGE ACCOMODATIONS</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1951 PORT CARNEY PL</AddressLine1Txt>
            <CityNm>NEWPORT BEACH</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>92660</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>EVENT PLANNING</ServicesDesc>
        <CompensationAmt>155648</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>LEWIS-BURKE ASSOCIATES LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>440 1ST ST NW 700</AddressLine1Txt>
            <CityNm>WASHINGTON</CityNm>
            <StateAbbreviationCd>DC</StateAbbreviationCd>
            <ZIPCd>20001</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>GOVERNMENT RELATION SERVICES</ServicesDesc>
        <CompensationAmt>143000</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>3</CntrctRcvdGreaterThan100KCnt>
      <AllOtherContributionsAmt>2965</AllOtherContributionsAmt>
      <TotalContributionsAmt>2965</TotalContributionsAmt>
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        <Desc>MEETINGS AND CONFERENC</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>833437</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>833437</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>PUBLICATIONS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>531428</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>531428</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP DUES</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>505825</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>505825</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>HEALTHCARE SYMPOSIUM</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>479570</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>479570</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>TECHNICAL GROUP</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>21334</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>21334</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalOthProgramServiceRevGrp>
        <TotalRevenueColumnAmt>27743</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>14748</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>12995</UnrelatedBusinessRevenueAmt>
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      <TotalProgramServiceRevenueAmt>2399337</TotalProgramServiceRevenueAmt>
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        <TotalRevenueColumnAmt>20412</TotalRevenueColumnAmt>
        <ExclusionAmt>20412</ExclusionAmt>
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      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>458672</SecuritiesAmt>
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      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>470144</SecuritiesAmt>
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      <GainOrLossGrp>
        <SecuritiesAmt>-11472</SecuritiesAmt>
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      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>-11472</TotalRevenueColumnAmt>
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      <CostOfGoodsSoldAmt>2035</CostOfGoodsSoldAmt>
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        <ExclusionAmt>8337</ExclusionAmt>
      </NetIncomeOrLossGrp>
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        <Desc>MISCELLANEOUS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>3292</TotalRevenueColumnAmt>
        <ExclusionAmt>3292</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>3292</OtherRevenueTotalAmt>
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        <RelatedOrExemptFuncIncomeAmt>2386342</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>12995</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>20569</ExclusionAmt>
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      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
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        <ProgramServicesAmt>5000</ProgramServicesAmt>
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      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>16795</TotalAmt>
        <ProgramServicesAmt>16795</ProgramServicesAmt>
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        <ProgramServicesAmt>5000</ProgramServicesAmt>
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        <TotalAmt>1260944</TotalAmt>
        <ProgramServicesAmt>484347</ProgramServicesAmt>
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      <FeesForServicesLegalGrp>
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        <ManagementAndGeneralAmt>3809</ManagementAndGeneralAmt>
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      <FeesForServicesAccountingGrp>
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        <ManagementAndGeneralAmt>36528</ManagementAndGeneralAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
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        <ManagementAndGeneralAmt>4853</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>418735</ProgramServicesAmt>
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        <TotalAmt>1255</TotalAmt>
        <ProgramServicesAmt>1255</ProgramServicesAmt>
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        <ProgramServicesAmt>16373</ProgramServicesAmt>
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        <ProgramServicesAmt>1277</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8337</ManagementAndGeneralAmt>
      </InformationTechnologyGrp>
      <TravelGrp>
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        <ProgramServicesAmt>39545</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1124</ManagementAndGeneralAmt>
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      <ConferencesMeetingsGrp>
        <TotalAmt>582700</TotalAmt>
        <ProgramServicesAmt>528570</ProgramServicesAmt>
        <ManagementAndGeneralAmt>54130</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>5329</ProgramServicesAmt>
        <ManagementAndGeneralAmt>6062</ManagementAndGeneralAmt>
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        <Desc>TAXES</Desc>
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        <ManagementAndGeneralAmt>724</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>MISCELLANEOUS</Desc>
        <TotalAmt>47207</TotalAmt>
        <ProgramServicesAmt>13872</ProgramServicesAmt>
        <ManagementAndGeneralAmt>33335</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>DUES AND SUBSCRIPTIONS</Desc>
        <TotalAmt>45117</TotalAmt>
        <ProgramServicesAmt>28284</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>HONORARIA AND TROPHIES</Desc>
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        <ProgramServicesAmt>40260</ProgramServicesAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>36580</TotalAmt>
        <ProgramServicesAmt>36580</ProgramServicesAmt>
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      <TotalFunctionalExpensesGrp>
        <TotalAmt>2706799</TotalAmt>
        <ProgramServicesAmt>1641222</ProgramServicesAmt>
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        <EOYAmt>554</EOYAmt>
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      <PrepaidExpensesDefrdChargesGrp>
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        <EOYAmt>236203</EOYAmt>
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      <LandBldgEquipCostOrOtherBssAmt>64510</LandBldgEquipCostOrOtherBssAmt>
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      <LandBldgEquipBasisNetGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>64510</EOYAmt>
      </LandBldgEquipBasisNetGrp>
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        <EOYAmt>384041</EOYAmt>
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        <EOYAmt>4678</EOYAmt>
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      <DeferredRevenueGrp>
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        <EOYAmt>709221</EOYAmt>
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      <TotalLiabilitiesGrp>
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        <EOYAmt>713899</EOYAmt>
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        <BOYAmt>1293214</BOYAmt>
        <EOYAmt>591543</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>1293214</BOYAmt>
        <EOYAmt>591543</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>1953117</BOYAmt>
        <EOYAmt>1305442</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-283928</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>58149</NetUnrlzdGainsLossesInvstAmt>
      <PriorPeriodAdjustmentsAmt>-475892</PriorPeriodAdjustmentsAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>0</FSAuditedInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
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      <GiftsGrantsContrisRcvd509Grp>
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        <CurrentTaxYearAmt>2965</CurrentTaxYearAmt>
        <TotalAmt>5551</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
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        <CurrentTaxYearMinus3YearsAmt>1573314</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1751274</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>2316723</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>2396714</CurrentTaxYearAmt>
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      <Total509Grp>
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        <CurrentTaxYearMinus3YearsAmt>1573314</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1751274</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>2319309</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>2399679</CurrentTaxYearAmt>
        <TotalAmt>10439019</TotalAmt>
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      <AmountsRcvdDsqlfyPersonGrp>
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      </AmountsRcvdDsqlfyPersonGrp>
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      </SubstantialContributorsAmtGrp>
      <SubstAndDsqlfyPrsnsTotGrp>
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        <CurrentTaxYearAmt>454278</CurrentTaxYearAmt>
        <TotalAmt>924131</TotalAmt>
      </SubstAndDsqlfyPrsnsTotGrp>
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      <GrossInvestmentIncome509Grp>
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        <CurrentTaxYearMinus2YearsAmt>20126</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>23761</CurrentTaxYearMinus1YearAmt>
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        <CurrentTaxYearMinus3YearsAmt>8344</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>13600</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>34</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3292</CurrentTaxYearAmt>
        <TotalAmt>28707</TotalAmt>
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        <CurrentTaxYearMinus2YearsAmt>1803292</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>2362359</CurrentTaxYearMinus1YearAmt>
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      <InvestmentIncomeCYPct>0.00800</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00740</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, PART III, LINE 12, EXPLANATION OF OTHER INCOME:</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER REVENUE - 2019 AMOUNT: $ 3,437. 2020 AMOUNT: $ 8,344. 2021 AMOUNT: $ 13,600. 2022 AMOUNT: $ 34. 2023 AMOUNT: $ 3,292.</ExplanationTxt>
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    <IRS990ScheduleC documentId="RetDoc1039700001">
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      <PaidStaffOrManagementInd>1</PaidStaffOrManagementInd>
      <MediaAdvertisementsInd>0</MediaAdvertisementsInd>
      <MailingsMembersInd>0</MailingsMembersInd>
      <PublicationsOrBroadcastInd>0</PublicationsOrBroadcastInd>
      <GrantsOtherOrganizationsInd>0</GrantsOtherOrganizationsInd>
      <DirectContactLegislatorsInd>1</DirectContactLegislatorsInd>
      <DirectContactLegislatorsAmt>120000</DirectContactLegislatorsAmt>
      <RalliesDemonstrationsInd>0</RalliesDemonstrationsInd>
      <OtherActivitiesInd>0</OtherActivitiesInd>
      <TotalLobbyingExpendituresAmt>120000</TotalLobbyingExpendituresAmt>
      <NotDescribedSection501c3Ind>0</NotDescribedSection501c3Ind>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART II-B, LINE 1:</FormAndLineReferenceDesc>
        <ExplanationTxt>HUMAN FACTORS AND ERGONOMICS SOCIETY ESTIMATES THAT $120,000 WAS PAID TO LEWIS-BURKE ASSOCIATES, WASHINGTON, DC FOR LOBBYING, INCLUDING INFLUENCING LEGISLATION, DIRECT CONTACT WITH MEMBERS OF CONGRESS AND THEIR STAFFS, AND COMMUNICATION WITH COVERED EXECUTIVE BRANCH OFFICIALS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="RetDoc1040000001">
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        <BookValueAmt>64510</BookValueAmt>
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    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>EDUCATIONAL AWARDS AND TRAVEL GRANTS</GrantTypeTxt>
        <RecipientCnt>35</RecipientCnt>
        <CashGrantAmt>14795</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>CHAPANIS AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>2000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>GRANTEES ARE REQUIRED TO SUBMIT INTERIM AND FINAL REPORTS TO HFES AND ARE REQUIRED TO DELIVER RESEARCH FINDINGS AT THE HFES ANNUAL MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS CONTRACTED WITH SMITHBUCKLIN TO MANAGE ITS OPERATIONS. SMITHBUCKLIN PROVIDES GENERAL MANAGEMENT, FINANCIAL SERVICES, AND OVERHEAD OPERATING SERVICES. DURING 2023 OF THE TOTAL FEES PAID TO SMITHBUCKLIN, $278,000 WAS FOR EXECUTIVE MANAGEMENT SERVICES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBERS OF THE SOCIETY ARE EMPOWERED IN THE BYLAWS TO ELECT MEMBERS OF THE GOVERNING BODY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS PREPARED BY AN INDEPENDENT ACCOUNTING FIRM. A DRAFT OF THE FORM 990 IS REVIEWED BY MANAGEMENT AND IS THEN PROVIDED TO THE EXECUTIVE COUNCIL AND FINANCE COMMITTEE PRIOR TO BEING FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS, FINANCIAL STATEMENTS AND 990 AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER PROFESSIONAL FEES: PROGRAM SERVICE EXPENSES 376,103. MANAGEMENT AND GENERAL EXPENSES 54,000. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 430,103. CONSULTING FEES: PROGRAM SERVICE EXPENSES 42,632. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 42,632.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>