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        <PersonNm>Saku Tsuneta</PersonNm>
        <TitleTxt>Governor</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Tomonori Usuda</PersonNm>
        <TitleTxt>Governor</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Kim Venn</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Suijian Xue</PersonNm>
        <TitleTxt>GOVERNOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Henry Yang</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Gang Zhao</PersonNm>
        <TitleTxt>Governor- End date 08/31/2020</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Jonas Zmuidzinas</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Xuefeng Wu</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Paul Jenny</PersonNm>
        <TitleTxt>GOV/ACTING TREASURER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Luc Simard</PersonNm>
        <TitleTxt>GOVERNOR</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <CompensationFromOtherSrcsInd>true</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>CALIFORNIA INSTITUTE OF TECHNOLOGY</PersonNm>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1200 E CALIFORNIA BLVD</AddressLine1Txt>
            <CityNm>PASADENA</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
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          </USAddress>
        </ContractorAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
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          <USAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>BCF Solutions Inc</PersonNm>
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          <USAddress>
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            <CityNm>CHANTILLY</CityNm>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>M3 Engineering and Technology</PersonNm>
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        <ContractorAddress>
          <USAddress>
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            <CityNm>TUCSON</CityNm>
            <StateAbbreviationCd>AZ</StateAbbreviationCd>
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        </ContractorAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>Cilas</PersonNm>
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        <ContractorAddress>
          <ForeignAddress>
            <AddressLine1Txt>8 AVENUE BUFFON CS 16319</AddressLine1Txt>
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            <ProvinceOrStateNm>0</ProvinceOrStateNm>
            <CountryCd>FR</CountryCd>
            <ForeignPostalCd>45063 CEDEX 2</ForeignPostalCd>
          </ForeignAddress>
        </ContractorAddress>
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        <CompensationAmt>1040842</CompensationAmt>
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      <TotalContributionsAmt>34844902</TotalContributionsAmt>
      <TotalProgramServiceRevenueAmt>0</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>322680</TotalRevenueColumnAmt>
        <ExclusionAmt>322680</ExclusionAmt>
      </InvestmentIncomeGrp>
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        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </IncmFromInvestBondProceedsGrp>
      <RoyaltiesRevenueGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </RoyaltiesRevenueGrp>
      <RentalIncomeOrLossGrp>
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        <PersonalAmt>0</PersonalAmt>
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      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </NetRentalIncomeOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
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      </NetGainOrLossInvestmentsGrp>
      <FundraisingGrossIncomeAmt>0</FundraisingGrossIncomeAmt>
      <FundraisingDirectExpensesAmt>0</FundraisingDirectExpensesAmt>
      <NetIncmFromFundraisingEvtGrp>
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      <GamingGrossIncomeAmt>0</GamingGrossIncomeAmt>
      <GamingDirectExpensesAmt>0</GamingDirectExpensesAmt>
      <NetIncomeFromGamingGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
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      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
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        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </NetIncomeOrLossGrp>
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        <Desc>OTHER INCOME</Desc>
        <BusinessCd>900099</BusinessCd>
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        <ExclusionAmt>42918</ExclusionAmt>
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        <ProgramServicesAmt>406592</ProgramServicesAmt>
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        <ProgramServicesAmt>50000</ProgramServicesAmt>
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      <BenefitsToMembersGrp>
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        <ProgramServicesAmt>747443</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1749093</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>116781</ProgramServicesAmt>
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        <ProgramServicesAmt>1399945</ProgramServicesAmt>
        <ManagementAndGeneralAmt>466422</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>52743</ProgramServicesAmt>
        <ManagementAndGeneralAmt>128506</ManagementAndGeneralAmt>
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      <FeesForServicesLegalGrp>
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        <ProgramServicesAmt>1691578</ProgramServicesAmt>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>214295</ManagementAndGeneralAmt>
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      <FeesForServicesLobbyingGrp>
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      </FeesForServicesLobbyingGrp>
      <FeesForServicesProfFundraising>
        <TotalAmt>0</TotalAmt>
      </FeesForServicesProfFundraising>
      <FeesForSrvcInvstMgmntFeesGrp>
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      </FeesForSrvcInvstMgmntFeesGrp>
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        <ProgramServicesAmt>174583</ProgramServicesAmt>
        <ManagementAndGeneralAmt>42456</ManagementAndGeneralAmt>
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      </AdvertisingGrp>
      <OfficeExpensesGrp>
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        <ProgramServicesAmt>51392</ProgramServicesAmt>
        <ManagementAndGeneralAmt>12472</ManagementAndGeneralAmt>
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      <InformationTechnologyGrp>
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        <ProgramServicesAmt>226093</ProgramServicesAmt>
        <ManagementAndGeneralAmt>36863</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>1445992</ProgramServicesAmt>
        <ManagementAndGeneralAmt>172966</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>76113</ProgramServicesAmt>
        <ManagementAndGeneralAmt>35220</ManagementAndGeneralAmt>
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      <PymtTravelEntrtnmntPubOfclGrp>
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      <ConferencesMeetingsGrp>
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        <ProgramServicesAmt>26406</ProgramServicesAmt>
        <ManagementAndGeneralAmt>7636</ManagementAndGeneralAmt>
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      <InterestGrp>
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        <ProgramServicesAmt>1258211</ProgramServicesAmt>
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      <PaymentsToAffiliatesGrp>
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        <ProgramServicesAmt>791598</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>1254593</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
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      <OtherExpensesGrp>
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        <EOYAmt>683578</EOYAmt>
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        <EOYAmt>1329581</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>125875100</EOYAmt>
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        <EOYAmt>158324359</EOYAmt>
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        <EOYAmt>2784933</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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      <LoansFromOfficersDirectorsGrp>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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      <UnsecuredNotesLoansPayableGrp>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>17725669</EOYAmt>
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        <EOYAmt>20510602</EOYAmt>
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      <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, SCHEDULE J, PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>ONE KEY EMPLOYEE RECEIVED FIRST-CLASS TRAVEL IN 2020. THIS WAS A BUSINESS EXPENSE AND WAS NOT INCLUDED IN THE EMPLOYEE'S COMPENSATION. ONE OFFICER RECEIVED A TAX GROSS UP AND A HOUSING ALLOWANCE WHICH IS INCLUDED IN SCHEDULE J, PART II, COLUMN (B)(III). FORM 990, SCHEDULE J, PART I, LINE 1B TAX INDEMNIFICATION AND GROSS-UP PAYMENTS ARE SUBJECT TO MANAGEMENT APPROVAL.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, SCHEDULE J, PART II</FormAndLineReferenceDesc>
        <ExplanationTxt>EDWARD STONE, GARY SANDERS AND FENGCHUAN LIU ARE COMPENSATED BY CALIFORNIA INSTITUTE OF TECHNOLOGY, AN UNRELATED ORGANIZATION. TIO REIMBURSES THE CALIFORNIA INSTITUTE OF TECHNOLOGY FOR THE COSTS OF THOSE EMPLOYEES RELATED TO THE SERVICES PROVIDED TO TIO. THE AMOUNTS INCLUDED IN PART VII AND SCHEDULE J, PART II REPRESENT THEIR COMPENSATION IN CONNECTION WITH THEIR SERVICES TO TIO.</ExplanationTxt>
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        <FormAndLineReferenceDesc>PART I, LINE 1 AND PART III, LINES 1 AND 4A</FormAndLineReferenceDesc>
        <ExplanationTxt>TMT INTERNATIONAL OBSERVATORY (TIO) WAS FOUNDED BY THE MEMBERS LISTED BELOW EXCLUSIVELY TO FURTHER CHARITABLE, EDUCATIONAL AND SCIENTIFIC PURPOSES AND, WITHIN SUCH LIMITS, TO ADVANCE SCIENTIFIC KNOWLEDGE AND EDUCATION THROUGH THE STUDY, OBSERVATION, AND COLLECTION OF IMAGES AND INFORMATION FROM DEEP SPACE WITH THE OBJECTIVE OF FURTHERING HUMAN UNDERSTANDING OF ASTRONOMY AND THE ORIGINS OF THE UNIVERSE: 1. THE REGENTS OF THE UNIVERSITY OF CALIFORNIA ("UC") 2. CALIFORNIA INSTITUTE OF TECHNOLOGY ("CALTECH") 3. THE NATIONAL INSTITUTES OF NATURAL SCIENCES ("NINS") 4. THE NATIONAL ASTRONOMICAL OBSERVATORIES OF THE CHINESE ACADEMY OF SCIENCES ("NAOC") 5. THE NATIONAL RESEARCH COUNCIL OF CANADA ("NRC") 6. THE DEPARTMENT OF SCIENCE AND TECHNOLOGY, GOVERNMENT OF INDIA ("DST") TIO IS PURSUING ITS PURPOSE BY DESIGNING, DEVELOPING, CONSTRUCTING, AND OPERATING A "STATE-OF-THE-ART" THIRTY-METER, WORLD CLASS TELESCOPE AND ASSOCIATED OBSERVATORY ON MAUNA KEA IN HAWAI'I (THE "TMT PROJECT") AND, IN RELATION THERETO, FOSTERING ACADEMIC AND SCIENTIFIC INTERACTION AMONG EDUCATIONAL AND OTHER RESEARCH INSTITUTIONS ON A GLOBAL BASIS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 1</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING BODY OF TIO IS ITS BOARD. THE BOARD IS COMPRISED OF 3 GOVERNORS APPOINTED BY EACH OF THE 6 MEMBERS OF THE ORGANIZATION. EACH MEMBER MUST DESIGNATE ONE OF ITS GOVERNORS AS A VOTING REPRESENTATIVE. AS OF DECEMBER 31, 2020, THE BOARD HAD A TOTAL OF 18 GOVERNORS, OF WHICH 6 GOVERNORS ARE VOTING REPRESENTATIVES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOLLOWING INDIVIDUALS HAVE A BUSINESS RELATIONSHIP AS A RESULT OF THEIR RELATIONSHIPS WITH THEIR ORGANIZATIONS AND THE TMT PROJECT: UC: HENRY YANG, MICHAEL BOLTE, PAUL JENNY CALTECH: ED STONE, DIANA JERGOVIC, TOM SOIFER, JONAS ZMUIDZINAS, GARY SANDERS, FENGCHUAN LIU NRC: KIM VENN, DON BROOKS, LUC SIMARD NINS: SATORI IGUCHI, SAKU TSUNETA, TOMONORI USUDA NAOC: SUIJIAN XUE, SHUDE MAO, GANG ZHAO, FUNG YUAN, XUEFENG WU DST: ESWAR REDDY, PRAVEER ASTHANA, A.N. RAMAPRAKASH</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINES 6 AND 7</FormAndLineReferenceDesc>
        <ExplanationTxt>AS OF 12/31/2020 THE MEMBERS OF TIO WERE: 1. UC 2. CALTECH 3. NINS 4. NAOC 5. NRC 6. DST GOVERNANCE DECISIONS OF THE ORGANIZATION INCLUDING THE APPOINTMENT AND NUMBER OF GOVERNORS, ADMISSION OF NEW MEMBERS AND THE TERMS OF SUCH ADMISSION ARE RESERVED TO THE MEMBERS OF THE ORGANIZATION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>WORKING WITH PRICEWATERHOUSECOOPERS, LLP ("PWC"), THE FORM 990 IS PREPARED. THE FORM 990 IS THEN REVIEWED BY MANAGEMENT, THE LEGAL COUNSEL AND THE AUDIT COMMITTEE. PRIOR TO FILING WITH THE IRS THE FINAL FORM 990 IS MADE AVAILABLE TO THE FULL BOARD. PWC SIGNS THE RETURN AS PAID PREPARER AND ELECTRONICALLY FILES THE RETURN WITH THE IRS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ON AN ANNUAL BASIS TIO DISTRIBUTES CONFLICT OF INTEREST QUESTIONNAIRES TO THE BOARD MEMBERS, OFFICERS, AND KEY EMPLOYEES TO COMPLETE AND RETURN. MANAGEMENT OF TIO REVIEWS THE RETURNED FORMS FOR COMPLIANCE. IF A CONFLICT IS DISCOVERED IT IS ESCALATED TO THE APPROPRIATE PARTY WITHIN THE ORGANIZATION. ALL CONFLICTS ARE RESOLVED IN ACCORDANCE WITH THE INSTITUTE'S WRITTEN CONFLICT OF INTEREST POLICIES.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS AND POLICIES, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE NOT OPEN TO PUBLIC INSPECTION.</ExplanationTxt>
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