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        <PersonNm>DARYL ROBERTS</PersonNm>
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        <PersonNm>DAVID DIXON</PersonNm>
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        <PersonNm>DAVID PARRILLO</PersonNm>
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        <PersonNm>HUGH R JAMES</PersonNm>
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        <PersonNm>JAMES R BEILSTEIN JR</PersonNm>
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        <PersonNm>JEAN W TOM</PersonNm>
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        <PersonNm>JESSICA O WINTER</PersonNm>
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        <PersonNm>JOSEPH D SMITH</PersonNm>
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        <PersonNm>LAURA MATZ</PersonNm>
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        <PersonNm>MARY KATHRYN LEE</PersonNm>
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        <PersonNm>NORMA A ALCANTAR</PersonNm>
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        <PersonNm>OMOLOLA ENIOLA-ADEFESO</PersonNm>
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        <PersonNm>BARBARA VALENTINE</PersonNm>
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        <PersonNm>DARLENE SCHUSTER</PersonNm>
        <TitleTxt>EXECUTIVE DIR. &amp; CEO (UNTIL 10/2024)</TitleTxt>
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        <PersonNm>EVAN FLACH</PersonNm>
        <TitleTxt>SR. DIR. CONFERENCES</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>GINA GATTO</PersonNm>
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        <PersonNm>IGNASI PALOU-RIVERA</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>LISA LANZKOWSKY</PersonNm>
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        <PersonNm>MICHELLE BRYNER</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SHAKEEL KADRI</PersonNm>
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        <PersonNm>WENDY YOUNG</PersonNm>
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        <PersonNm>AMIT GUPTA</PersonNm>
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        <PersonNm>ANIL GOKHALE</PersonNm>
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        <PersonNm>DENISE DELUCA MALLON</PersonNm>
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        <PersonNm>JAMAL SALIM</PersonNm>
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        <PersonNm>LUCIA MATTHEW</PersonNm>
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            <BusinessNameLine1Txt>KELLEN COMPANY</BusinessNameLine1Txt>
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            <AddressLine1Txt>529 14TH STREET NW SUITE 1280</AddressLine1Txt>
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            <StateAbbreviationCd>DC</StateAbbreviationCd>
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      <ContractorCompensationGrp>
        <ContractorName>
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            <BusinessNameLine1Txt>SANDRA L SIDEY</BusinessNameLine1Txt>
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            <StateAbbreviationCd>MD</StateAbbreviationCd>
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        <ContractorName>
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            <BusinessNameLine1Txt>JULIE BONASSO</BusinessNameLine1Txt>
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            <AddressLine1Txt>200271 BLACKBERRY LANE</AddressLine1Txt>
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      <ContractorCompensationGrp>
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            <BusinessNameLine1Txt>THE DRINK AGENCY</BusinessNameLine1Txt>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>HIGHER LOGIC</BusinessNameLine1Txt>
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        <BusinessCd>541900</BusinessCd>
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        <TotalRevenueColumnAmt>4533396</TotalRevenueColumnAmt>
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        <TotalRevenueColumnAmt>-48935</TotalRevenueColumnAmt>
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        <ProgramServicesAmt>35423</ProgramServicesAmt>
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        <ProgramServicesAmt>1787512</ProgramServicesAmt>
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        <TotalAmt>11758473</TotalAmt>
        <ProgramServicesAmt>9088635</ProgramServicesAmt>
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        <ProgramServicesAmt>942945</ProgramServicesAmt>
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        <ProgramServicesAmt>1377071</ProgramServicesAmt>
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        <TotalAmt>1030236</TotalAmt>
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        <FundraisingAmt>55310</FundraisingAmt>
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      <FeesForServicesLegalGrp>
        <TotalAmt>153337</TotalAmt>
        <ProgramServicesAmt>70447</ProgramServicesAmt>
        <ManagementAndGeneralAmt>82890</ManagementAndGeneralAmt>
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      <FeesForServicesProfFundraising>
        <TotalAmt>72765</TotalAmt>
        <FundraisingAmt>72765</FundraisingAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>92317</TotalAmt>
        <ManagementAndGeneralAmt>92317</ManagementAndGeneralAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LISA LANZKOWSKY</PersonNm>
        <TitleTxt>CDO (UNTIL 10/2024)</TitleTxt>
        <BaseCompensationFilingOrgAmt>189946</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>27398</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>1225</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>22748</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>46316</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>287633</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JAMAL SALIM</PersonNm>
        <TitleTxt>CHIEF PEOPLE OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>201453</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>18746</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>4533</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>20290</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>41957</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>286979</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>EVAN FLACH</PersonNm>
        <TitleTxt>SR. DIR. CONFERENCES</TitleTxt>
        <BaseCompensationFilingOrgAmt>216761</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>25856</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>288</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>28219</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>11261</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>282385</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LUCIA MATTHEW</PersonNm>
        <TitleTxt>CONTROLLER</TitleTxt>
        <BaseCompensationFilingOrgAmt>197783</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>18940</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>8574</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>25551</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>20748</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>271596</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>GINA GATTO</PersonNm>
        <TitleTxt>CHIEF OF EXTERNAL ENGAGEMENT</TitleTxt>
        <BaseCompensationFilingOrgAmt>175695</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>17096</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>4168</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>21544</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>18930</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>237433</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>WENDY YOUNG</PersonNm>
        <TitleTxt>SR DIR. INS. FOR ILI (UNTIL 9/2024)</TitleTxt>
        <BaseCompensationFilingOrgAmt>142588</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>18648</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>7925</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>16503</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>10169</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>195833</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES PAYMENTS FOR HOUSING ALLOWANCES TO SPECIFIC EMPLOYEES AS CONTRACTED. THOSE AMOUNTS ARE REPORTED IN PART II, COLUMN (III) AS PART OF OTHER COMPENSATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4A</FormAndLineReferenceDesc>
        <ExplanationTxt>SEVERANCE PAYMENT OF $62,275 WAS PAID DURING TAX YEAR 2024.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION PAID BONUSES CONTINGENT ON THE NET EARNINGS OF THE ORGANIZATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION PROVIDED NON-FIXED PAYMENTS BASED UPON THE PERFORMANCE OF THE ORGANIZATION EVALUATED AGAINST AN ANNUAL SCORECARD OF GOALS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>THE DRINK AGENCY</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>KEY EMPLOYEE</RelationshipDescriptionTxt>
        <TransactionAmt>176590</TransactionAmt>
        <TransactionDesc>THE ORGANIZATION USED THE SERVICES OF THE DRINK AGENCY, OWNED BY A FAMILY MEMBER OF LISA LANZKOWSKY. AMERICAN INSTITUTE OF CHEMICAL ENGINEERS COMPENSATED THE AGENCY $176,590. THE SERVICES OF THIS VENDOR WAS TERMINATED DURING 2024.</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS OVER 51,000 MEMBERS. THERE ARE NO STOCKHOLDERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS, THE ORGANIZATION'S GOVERNING BODY, IS ELECTED BY GENERAL MEMBERSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE DRAFT FORM 990 AND ALL ASSOCIATED SCHEDULES ARE FIRST REVIEWED BY STAFF (EXECUTIVE DIRECTOR &amp; CEO, CHIEF FINANCIAL OFFICER AND CONTROLLER). NEXT, ALL DOCUMENTS ARE POSTED TO THE BOARD PORTAL, AND THE BOARD MEMBERS ARE NOTIFIED THAT THE DOCUMENTS HAVE BEEN UPLOADED. BOARD MEMBERS ARE REQUESTED TO INDICATE VIA EMAIL THEY HAVE READ THE FORM 990, AND EITHER HAVE NO CONCERNS, OR QUESTIONS OR COMMENTS ARE RAISED. THE EMAIL IS SHARED WITH THE TREASURER, CONTROLLER AND THE CFO. THE CONTROLLER ADDRESSES ISSUES AND COORDINATES MODIFICATIONS AS REQUIRED. THE TREASURER IS INFORMED OF MODIFICATIONS, AND THE TREASURER AND CHAIR OF THE AUDIT COMMITTEE THEN GIVE THE FINAL APPROVAL TO THE CFO TO FILE THE FORM 990. THE DOCUMENTS ARE THEN FILED WITH THE IRS AND THE FILED DOCUMENTS ARE POSTED TO THE BOARD PORTAL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>BOARD OFFICERS AND DIRECTORS, AND SENIOR AICHE STAFF, INCLUDING ALL KEY EMPLOYEES, REVIEW THE CONFLICT OF INTEREST POLICY ANNUALLY AND SIGN A FORM INDICATING THAT THEY UNDERSTAND THE POLICY AND WILL ADHERE TO IT WHILE ENGAGED IN ACTIVITIES WITH AICHE. ALL EXCEPTIONS ARE NOTED AND DESCRIBED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION COMMITTEE, WHICH IS THE EXECUTIVE COMMITTEE OF THE BOARD OF DIRECTORS PLUS 2 PAST PRESIDENTS, REVIEWS THE COMPENSATION OF THE EXECUTIVE DIRECTOR &amp; CEO. AN EXTERNAL COMPENSATION ORGANIZATION IS HIRED TO PERFORM COMPARABILITY STUDIES ON A ROLLING BASIS EVERY 3-4 YEARS. THE COMPENSATION COMMITTEE REVIEWS THE COMPARABILITY REPORT OF THE EXECUTIVE DIRECTOR &amp; CEO AND APPROVES THE COMPENSATION OF THE EXECUTIVE DIRECTOR &amp; CEO. THE COMPENSATION COMMITTEE PROVIDES REPORTS TO THE AICHE BOARD OF DIRECTORS. THE EXECUTIVE DIRECTOR &amp; CEO IS RESPONSIBLE FOR SETTING COMPENSATION OF ALL STAFF. THE EXECUTIVE DIRECTOR &amp; CEO UTILIZES THIRD PARTY COMPENSATION BENCHMARKING STUDIES TO CONFIRM THAT COMPENSATION IS WITHIN GUIDELINES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S DOCUMENTS ARE AVAILABLE TO THE PUBLIC AS FOLLOWS: 1) GOVERNING DOCUMENTS(CONSTITUTION AND BYLAWS) ARE POSTED ON THE AICHE WEBSITE (WWW.AICHE.ORG) 2) CONFLICT OF INTEREST POLICY IS AVAILABLE ON THE WEBSITE 3) AUDITED FINANCIAL STATEMENTS ARE AVAILABLE BOTH IN SUMMARY AND COMPLETE VERSIONS ON THE WEBSITE, AND ARE PROVIDED ON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER PROFESSIONAL FEES: PROGRAM SERVICE EXPENSES 5,611,599. MANAGEMENT AND GENERAL EXPENSES 830,992. FUNDRAISING EXPENSES 93,202. TOTAL EXPENSES 6,535,793.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>PENSION RELATED CHANGES OTHER THAN NET PERIODIC PENSION COST 723,996. POST RETIREMENT RELATED CHANGES OTHER THAN NET PERIODIC POSTRETIREMENT COST -10,638. OTHER COMPONENTS OF NET PERIODIC PENSION COST -102,248. OTHER COMPONENT RELATED TO NET PERIODIC POSTRETIREMENT COST 35,591.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>