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        <PersonNm>C Dan Mote Jr</PersonNm>
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        <PersonNm>Victor Dzau</PersonNm>
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        <PersonNm>Bruce Darling</PersonNm>
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        <PersonNm>Mary Salmon</PersonNm>
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        <PersonNm>Richard Bissell</PersonNm>
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        <PersonNm>James F Hinchman</PersonNm>
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      <SupplementalInformationDetail>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>361248</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Kenneth Fulton</PersonNm>
        <TitleTxt>Executive Director</TitleTxt>
        <BaseCompensationFilingOrgAmt>275744</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>142153</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>49050</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>12630</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>479577</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>James Jensen</PersonNm>
        <TitleTxt>Exec Dir Cong &amp; Govt Affairs</TitleTxt>
        <BaseCompensationFilingOrgAmt>281638</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>7932</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>49050</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>7213</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>345833</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Robert Hauser</PersonNm>
        <TitleTxt>Executive Director DBASSE</TitleTxt>
        <BaseCompensationFilingOrgAmt>279355</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>9429</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>49050</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>15934</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>353768</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>HOUSING ALLOWANCE</FormAndLineReferenceDesc>
        <ExplanationTxt>SCHEDULE J, PART I, LINE 1 THE PRESIDENT OF THE National Academy of Medicine RECEIVED A SUPPLEMENT TO SALARY FOR THE COST OF RENTAL HOUSING IN THE WASHINGTON, DC AREA FOR PERSONAL USE AND TRAVEL EXPENSES BETWEEN NORTH CAROLINA AND WASHINGTON, DC. THE ALLOWANCE IS REPORTED AS TAXABLE INCOME ON FORM W-2.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>TRAVEL FOR COMPANIONS</FormAndLineReferenceDesc>
        <ExplanationTxt>SCHEDULE J, PART I, LINE 1 NAS PROCEDURES PROVIDE FOR REIMBURSEMENT OF TRAVEL EXPENSES FOR THE SPOUSES OF THE PRESIDENTS OF NAS, NAE, AND NAM SOLELY IN CIRCUMSTANCES IN WHICH THE SPOUSES PRESENCE SERVES A BONA FIDE BUSINESS PURPOSE OF THE NAS AND THE EXPENSES HAVE BEEN PROPERLY SUBSTANTIATED. TRAVEL EXPENSES ARE REVIEWED EACH YEAR THROUGH A SURVEY OF THE EXECUTIVE OFFICES OF THE PRESIDENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>TAX INDEMNIFICATION AND GROSS-UP PAYMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>SCHEDULE J, PART I, LINE 1 NAS PROVIDES TAX EQUALIZATION PAYMENTS FOR EMPLOYEES ON INTERNATIONAL ASSIGNMENT IN JAPAN GREATER THAN SIX MONTHS. THE OBJECTIVE OF THE NAS TAX EQUALIZATION GUIDELINES IS TO EQUALIZE THE TAX BURDEN OF EMPLOYEES ASSIGNED TO JAPAN.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART-TIME OFFICERS COMPENSATION</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR THE VICE PRESIDENT, TREASURER, FOREIGN SECRETARY AND HOME SECRETARY, TIME ESTIMATES ARE BASED ON A PERCENTAGE LEVEL OF EFFORT, WHICH RANGES BETWEEN 25% AND 50%. NAS REIMBURSES EACH PART-TIME OFFICER'S HOME INSTITUTION FOR THE APPLICABLE PERCENTAGE OF SALARY PAID BY THE HOME INSTITUTION. As of July 1, 2015, Sylvia T. Ceyer, Jeffrey M. Friedman, Susan Hanson, and Peter S. Kim joined the NAS Council following the departure of other council members. The compensation amounts reported for these four individuals are for the partial year they served from July 1 to December 31, 2015.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>NON-FIXED PAYMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>SCHEDULE J, PART I, LINE 7 A KEY EMPLOYEE OF NAS RECEIVED A LUMP-SUM MERIT AWARD. MERIT AWARDS ARE DETERMINED BY A NUMBER OF VARIABLES INCLUDING BUT NOT LIMITED TO INDIVIDUAL PERFORMANCE AS WELL AS ORGANIZATION OPERATIONAL ACHIEVEMENTS. MERIT AWARDS PAYMENTS ARE REPORTED IN PART II, COLUMN B(II).</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleK documentId="IRS990ScheduleK">
      <TaxExemptBondsIssuesGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <IssuerName>
          <BusinessNameLine1Txt>DISTRICT OF COLUMBIA</BusinessNameLine1Txt>
        </IssuerName>
        <BondIssuerEIN>536001131</BondIssuerEIN>
        <CUSIPNum>2548394D2</CUSIPNum>
        <BondIssuedDt>2008-06-09</BondIssuedDt>
        <IssuePriceAmt>66325000</IssuePriceAmt>
        <PurposeDesc>REFUND SERIES 1999B &amp; 1999C BONDS</PurposeDesc>
        <DefeasedInd>false</DefeasedInd>
        <OnBehalfOfIssuerInd>false</OnBehalfOfIssuerInd>
        <PoolFinancingInd>false</PoolFinancingInd>
      </TaxExemptBondsIssuesGrp>
      <TaxExemptBondsIssuesGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <IssuerName>
          <BusinessNameLine1Txt>DISTRICT OF COLUMBIA</BusinessNameLine1Txt>
        </IssuerName>
        <BondIssuerEIN>536001131</BondIssuerEIN>
        <CUSIPNum>2548395A7</CUSIPNum>
        <BondIssuedDt>2009-04-30</BondIssuedDt>
        <IssuePriceAmt>57500000</IssuePriceAmt>
        <PurposeDesc>REFUND SERIES 1999A BONDS</PurposeDesc>
        <DefeasedInd>false</DefeasedInd>
        <OnBehalfOfIssuerInd>false</OnBehalfOfIssuerInd>
        <PoolFinancingInd>false</PoolFinancingInd>
      </TaxExemptBondsIssuesGrp>
      <TaxExemptBondsIssuesGrp>
        <BondReferenceCd>C</BondReferenceCd>
        <IssuerName>
          <BusinessNameLine1Txt>DISTRICT OF COLUMBIA</BusinessNameLine1Txt>
        </IssuerName>
        <BondIssuerEIN>536001131</BondIssuerEIN>
        <CUSIPNum>2548398N6</CUSIPNum>
        <BondIssuedDt>2010-05-20</BondIssuedDt>
        <IssuePriceAmt>60876507</IssuePriceAmt>
        <PurposeDesc>RESTORE CONSTITUTION AVE FACILITY</PurposeDesc>
        <DefeasedInd>false</DefeasedInd>
        <OnBehalfOfIssuerInd>false</OnBehalfOfIssuerInd>
        <PoolFinancingInd>false</PoolFinancingInd>
      </TaxExemptBondsIssuesGrp>
      <TaxExemptBondsProceedsGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <RetiredAmt>0</RetiredAmt>
        <BondDefeasedAmt>0</BondDefeasedAmt>
        <TotalProceedsAmt>66325000</TotalProceedsAmt>
        <InReserveFundAmt>0</InReserveFundAmt>
        <CapitalizedInterestAmt>0</CapitalizedInterestAmt>
        <RefundingEscrowAmt>0</RefundingEscrowAmt>
        <IssuanceCostsFromProceedsAmt>561808</IssuanceCostsFromProceedsAmt>
        <CreditEnhancementAmt>0</CreditEnhancementAmt>
        <WorkingCapitalExpendituresAmt>0</WorkingCapitalExpendituresAmt>
        <CapitalExpendituresAmt>0</CapitalExpendituresAmt>
        <OtherSpentProceedsAmt>0</OtherSpentProceedsAmt>
        <UnspentAmt>0</UnspentAmt>
        <SubstantialCompletionYr>2002</SubstantialCompletionYr>
        <CurrentRefundingInd>true</CurrentRefundingInd>
        <AdvanceRefundingInd>false</AdvanceRefundingInd>
        <FinalAllocationMadeInd>true</FinalAllocationMadeInd>
        <AdequateBooksAndRecMaintInd>true</AdequateBooksAndRecMaintInd>
      </TaxExemptBondsProceedsGrp>
      <TaxExemptBondsProceedsGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <RetiredAmt>0</RetiredAmt>
        <BondDefeasedAmt>0</BondDefeasedAmt>
        <TotalProceedsAmt>57500000</TotalProceedsAmt>
        <InReserveFundAmt>0</InReserveFundAmt>
        <CapitalizedInterestAmt>0</CapitalizedInterestAmt>
        <RefundingEscrowAmt>0</RefundingEscrowAmt>
        <IssuanceCostsFromProceedsAmt>309719</IssuanceCostsFromProceedsAmt>
        <CreditEnhancementAmt>0</CreditEnhancementAmt>
        <WorkingCapitalExpendituresAmt>0</WorkingCapitalExpendituresAmt>
        <CapitalExpendituresAmt>0</CapitalExpendituresAmt>
        <OtherSpentProceedsAmt>0</OtherSpentProceedsAmt>
        <UnspentAmt>0</UnspentAmt>
        <SubstantialCompletionYr>2002</SubstantialCompletionYr>
        <CurrentRefundingInd>true</CurrentRefundingInd>
        <AdvanceRefundingInd>false</AdvanceRefundingInd>
        <FinalAllocationMadeInd>true</FinalAllocationMadeInd>
        <AdequateBooksAndRecMaintInd>true</AdequateBooksAndRecMaintInd>
      </TaxExemptBondsProceedsGrp>
      <TaxExemptBondsProceedsGrp>
        <BondReferenceCd>C</BondReferenceCd>
        <RetiredAmt>0</RetiredAmt>
        <BondDefeasedAmt>0</BondDefeasedAmt>
        <TotalProceedsAmt>60876507</TotalProceedsAmt>
        <InReserveFundAmt>0</InReserveFundAmt>
        <CapitalizedInterestAmt>4931470</CapitalizedInterestAmt>
        <RefundingEscrowAmt>0</RefundingEscrowAmt>
        <IssuanceCostsFromProceedsAmt>297750</IssuanceCostsFromProceedsAmt>
        <CreditEnhancementAmt>0</CreditEnhancementAmt>
        <WorkingCapitalExpendituresAmt>0</WorkingCapitalExpendituresAmt>
        <CapitalExpendituresAmt>52866639</CapitalExpendituresAmt>
        <OtherSpentProceedsAmt>2780648</OtherSpentProceedsAmt>
        <UnspentAmt>0</UnspentAmt>
        <SubstantialCompletionYr>2012</SubstantialCompletionYr>
        <CurrentRefundingInd>false</CurrentRefundingInd>
        <AdvanceRefundingInd>false</AdvanceRefundingInd>
        <FinalAllocationMadeInd>true</FinalAllocationMadeInd>
        <AdequateBooksAndRecMaintInd>true</AdequateBooksAndRecMaintInd>
      </TaxExemptBondsProceedsGrp>
      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <PrivateBusUseByOthersPct>0</PrivateBusUseByOthersPct>
        <ProcsNonqualifiedBondRemdtdInd>true</ProcsNonqualifiedBondRemdtdInd>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <PrivateBusUseByOthersPct>0</PrivateBusUseByOthersPct>
        <ProcsNonqualifiedBondRemdtdInd>true</ProcsNonqualifiedBondRemdtdInd>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>C</BondReferenceCd>
        <OwningBondFinancedPropertyInd>false</OwningBondFinancedPropertyInd>
        <AnyLeaseArrangementsInd>false</AnyLeaseArrangementsInd>
        <MgmtContractBondFincdPropInd>true</MgmtContractBondFincdPropInd>
        <EngageBondCounselContractsInd>true</EngageBondCounselContractsInd>
        <AnyResearchAgreementsInd>true</AnyResearchAgreementsInd>
        <EngageBondCounselResearchInd>true</EngageBondCounselResearchInd>
        <PrivateBusUseByOthersPct>0.01780</PrivateBusUseByOthersPct>
        <PrivateBusConcerningUBIPct>0.00000</PrivateBusConcerningUBIPct>
        <TotalPrivateBusinessUsePct>0.01780</TotalPrivateBusinessUsePct>
        <BondIssMeetPrvtSecPymtTestInd>false</BondIssMeetPrvtSecPymtTestInd>
        <ChangeInUseBondFinancedPropInd>false</ChangeInUseBondFinancedPropInd>
        <RemedialActionTakenInd>false</RemedialActionTakenInd>
        <ProcsNonqualifiedBondRemdtdInd>true</ProcsNonqualifiedBondRemdtdInd>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <Form8038TFiledInd>false</Form8038TFiledInd>
        <RebateNotDueYetInd>true</RebateNotDueYetInd>
        <ExceptionToRebateInd>true</ExceptionToRebateInd>
        <NoRebateDueInd>true</NoRebateDueInd>
        <VariableRateIssueInd>true</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>false</HedgeIdentifiedInBksAndRecInd>
        <HedgeProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </HedgeProviderName>
        <GrossProceedsInvestedInGICInd>false</GrossProceedsInvestedInGICInd>
        <GICProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </GICProviderName>
        <GrossProceedsInvestedInd>false</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>true</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <Form8038TFiledInd>false</Form8038TFiledInd>
        <RebateNotDueYetInd>true</RebateNotDueYetInd>
        <ExceptionToRebateInd>true</ExceptionToRebateInd>
        <NoRebateDueInd>true</NoRebateDueInd>
        <VariableRateIssueInd>true</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>false</HedgeIdentifiedInBksAndRecInd>
        <HedgeProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </HedgeProviderName>
        <GrossProceedsInvestedInGICInd>false</GrossProceedsInvestedInGICInd>
        <GICProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </GICProviderName>
        <GrossProceedsInvestedInd>false</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>true</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>C</BondReferenceCd>
        <Form8038TFiledInd>false</Form8038TFiledInd>
        <RebateNotDueYetInd>false</RebateNotDueYetInd>
        <ExceptionToRebateInd>true</ExceptionToRebateInd>
        <NoRebateDueInd>true</NoRebateDueInd>
        <VariableRateIssueInd>false</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>false</HedgeIdentifiedInBksAndRecInd>
        <HedgeProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </HedgeProviderName>
        <GrossProceedsInvestedInGICInd>false</GrossProceedsInvestedInGICInd>
        <GICProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </GICProviderName>
        <GrossProceedsInvestedInd>false</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>true</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <ProceduresCorrectiveActionInd>true</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <ProceduresCorrectiveActionInd>true</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>C</BondReferenceCd>
        <ProceduresCorrectiveActionInd>true</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART III, LINE 3A, COLUMN C</FormAndLineReferenceDesc>
        <ExplanationTxt>NAS HAS ENTERED INTO A MANAGEMENT OR SERVICE CONTRACT, WHICH NAS BELIEVES SATISFIES THE SAFE HARBOR STANDARDS UNDER REV. PROC. 97-13.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART III, LINE 3C, COLUMN C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE NAS HAS ENTERED INTO RESEARCH AGREEMENTS, WHICH NAS BELIEVES SATISFIES THE SAFE HARBOR STANDARDS UNDER REV. PROC. 2007-47.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART IV, LINE 2C, COLUMN A</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR BOND CUSIP #2548394D2, THE REBATE COMPUTATION WAS PERFORMED ON DECEMBER 3, 2012.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART IV, LINE 2C, COLUMN B</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR BOND CUSIP #2548395A7, THE REBATE COMPUTATION WAS PERFORMED ON DECEMBER 3, 2012.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART IV, LINE 2C, COLUMN C</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR BOND CUSIP #2548398N6, THE REBATE COMPUTATION WAS PERFORMED ON MAY 1, 2015. AN ADDITIONAL REBATE COMPUTATION WAS PERFORMED ON MAY 1, 2016.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleK>
    <IRS990ScheduleL documentId="IRS990ScheduleL">
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>RALPH J CICERONE</PersonNm>
        <RelationshipWithOrgTxt>PRESIDENT</RelationshipWithOrgTxt>
        <LoanPurposeTxt>PURCHASE RESIDENCE</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>2250000</OriginalPrincipalAmt>
        <BalanceDueAmt>2250000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>C DAN MOTE JR</PersonNm>
        <RelationshipWithOrgTxt>PRESIDENT - NAE</RelationshipWithOrgTxt>
        <LoanPurposeTxt>PURCHASE RESIDENCE</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>1500000</OriginalPrincipalAmt>
        <BalanceDueAmt>1500000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <TotalBalanceDueAmt>3750000</TotalBalanceDueAmt>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="IRS990ScheduleM">
      <WorksOfArtGrp />
      <ArtHistoricalTreasuresGrp />
      <ArtFractionalInterestGrp />
      <BooksAndPublicationsGrp />
      <ClothingAndHouseholdGoodsGrp />
      <CarsAndOtherVehiclesGrp />
      <BoatsAndPlanesGrp />
      <IntellectualPropertyGrp />
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>6</ContributionCnt>
        <NoncashContributionsRptF990Amt>317887</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Sale Price</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <SecuritiesCloselyHeldStockGrp />
      <SecurPrtnrshpTrustIntrstsGrp />
      <SecuritiesMiscellaneousGrp />
      <QualifiedContribHistStructGrp />
      <QualifiedContribOtherGrp />
      <RealEstateResidentialGrp />
      <RealEstateCommercialGrp />
      <RealEstateOtherGrp />
      <CollectiblesGrp />
      <FoodInventoryGrp />
      <DrugsAndMedicalSuppliesGrp />
      <TaxidermyGrp />
      <HistoricalArtifactsGrp />
      <ScientificSpecimensGrp />
      <ArchaeologicalArtifactsGrp />
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>true</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>true</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule M Line 32a</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization utilizes a third-party investment firm to receive and sell donated securities.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PRINCIPAL OFFICER</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Page 1, Section F The principal officer of the organization has changed from Ralph J. Cicerone to Marcia McNutt, who is currently serving as President. LOBBYING ACTIVITIES Form 990, Part IV, Line 4 DURING THE YEAR ENDED DECEMBER 31, 2015, THE INSTITUTION INCURRED COSTS (INCLUDING SALARY EXPENSES, OVERHEAD, AND G&amp;A) RELATED TO COMMUNICATION WITH MEMBERS OF CONGRESS AND CONGRESSIONAL STAFF IN CONNECTION WITH NATIONAL, STATE, OR LOCAL LEGISLATION, INCLUDING (BUT NOT LIMITED TO) THE FOLLOWING: LEGISLATION THAT WOULD UNDERMINE THE INDEPENDENCE, OBJECTIVITY AND EXPERTISE RELATING TO GULF WAR VETERANS' HEALTH ISSUES . THE OFFICE OF CONGRESSIONAL AND GOVERNMENT AFFAIRS (OCGA) ACTS AS THE LIASION BETWEEN THE ORGANIZATION AND CONGRESS AND THE EXECUTIVE BRANCH, WHICH INCLUDES MONITORING CURRENT LEGISLATION, RESPONDING TO INQUIRIES FROM CONGRESSIONAL OFFICES, REVIEWING TESTIMONY BY REPRESENTATIVES OF THE ORGANIZATION, AND COORDINATING BRIEFINGS ON REPORTS AND FINDINGS AND RECOMMENDATIONS OF STUDY COMMITTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SIGNIFICANT CHANGES TO GOVERNING DOCUMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, PART VI, SECTION A, LINE 4 THE CONSTITUTION AND BYLAWS OF THE NATIONAL ACADEMY OF SCIENCES (NAS) WERE AMENDED IN 2015 TO CHANGE THE NAME OF THE "INSTITUTE OF MEDICINE" TO THE "NATIONAL ACADEMY OF MEDICINE" (NAM). THE INSTITUTE OF MEDICINE WAS ESTABLISHED UNDER THE CONGRESSONAL CHARTER OF THE NAS IN 1970. THE NATIONAL ACADEMY OF ENGINEERING (NAE) WAS ESTABLISHED UNDER THE CONGRESSIONAL CHARTER OF THE NAS IN 1964. THE BYLAWS OF THE NAS WERE ALSO AMENDED TO UPDATE THE NUMBER OF NAM REPRESENTATIVES ON THE GOVERNING BOARD AND GOVERNING BOARD EXECUTIVE COMMITTEE OF THE NATIONAL RESEARCH COUNCIL (NRC), WHICH ACTS AS THE OPERATING ARM OF THE ORGANIZATION. MEMBERS OR STOCKHOLDERS Form 990, PART VI, SECTION A, LINES 6, 7A, AND 7B THE ORGANIZATION IS A PRIVATE MEMBERSHIP ORGANIZATION. THE NAS CONSTITUTION PROVIDES THAT THE ACADEMY SHALL CONSIST OF MEMBERS, MEMBERS EMERITI AND FOREIGN ASSOCIATES. MEMBERS OF NAS ARE ELECTED BY THE MEMBERS IN RECOGNITION OF THEIR DISTINGUISHED AND CONTINUING ACHIEVEMENTS IN ORIGINAL RESEARCH. THE OFFICERS OF THE ACADEMY ARE CHOSEN FROM THE MEMBERSHIP, AND AMENDMENTS TO THE ORGANIZATION'S CONSTITUTION AND BYLAWS, AND ELECTION OF NEW MEMBERS, OFFICERS, AND COUNCIL MEMBERS REQUIRE A VOTE OF THE MEMBERS. THE OFFICERS OF THE ORGANIZATION, TOGETHER WITH TWELVE MEMBERS TO BE ELECTED, SHALL CONSTITUTE THE NATIONAL ACADEMY OF SCIENCES (NAS) COUNCIL FOR THE TRANSACTION OF SUCH BUSINESS AS MAY BE ASSIGNED TO IT BY THE CONSTITUTION, BYLAWS, OR THE MEMBERSHIP. THE NAS COUNCIL HAS GENERAL SUPERVISION OVER THE ELECTION OF THE OFFICERS OF THE ORGANIZATION, AND SHALL SET THE DATE FOR ELECTION AND APPOINTING NOMINATING COMMITTEES. THE NAS COUNCIL MAY DELEGATE ITS AUTHORITY TO APPROPRIATE OFFICIALS OF THE ORGANIZATION EXCEPT WITH RESPECT TO THOSE AUTHORITIES CONCERNING MEMBERSHIP AFFAIRS. FORM 990 REVIEW PROCESS form 990, Part VI, Section B, Line 11 The Draft 990 is prepared by the Office of the Chief Financial Officer. It is reviewed by the Office of General Counsel and an external tax advisor before being reviewed by the auditing committee. The final form is then provided to the NAS Council prior to filing.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>CONFLICT OF INTEREST POLICY MONITORING AND ENFORCEMENT</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section B, Lines 12b, and 12c ANNUALLY, THE GENERAL COUNSEL LEADS A DISCUSSION AT A MEETING OF OFFICERS AND COUNCIL MEMBERS AT WHICH THE CONFLICT OF INTEREST POLICY IS REVIEWED. OFFICERS AND COUNCIL MEMBERS ARE ASKED TO SIGN A STATEMENT THAT THEY WILL ABIDE BY THE ORGANIZATION'S CONFLICT OF INTEREST POLICIES AND PROCEDURES. OFFICERS, COUNCIL MEMBERS, AND KEY EMPLOYEES ARE ASKED TO COMPLETE AN ANNUAL QUESTIONNAIRE REGARDING CERTAIN BUSINESS TRANSACTIONS THAT COULD POTENTIALLY RESULT IN A CONFLICT OF INTEREST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PROCESS OF DETERMINING COMPENSATION</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section B, Line 15 COMPENSATION DECISIONS FOR ALL DISQUALIFIED PERSONS AS DEFINED IN IRC SECTION 4958 ARE MADE ANNUALLY BY AN EXECUTIVE COMPENSATION COMMITTEE COMPOSED OF INDEPENDENT MEMBERS ON THE BASIS OF EXECUTIVE COMPENSATION COMPATIBILITY DATA, INCLUDING A MARKET COMPENSATION SURVEY CONDUCTED BY THE OFFICE OF HUMAN RESOURCES THAT REVIEWS THE COMPENSATION OF THE HEADS OF THE LEADING UNIVERSITIES AND CHIEF EXECUTIVE OFFICERS OF SIMILAR ORGANIZATIONS. THERE IS A RECORD OF THE EXECUTIVE COMPENSATION COMMITTEE'S DELIBERATIONS AND DECISIONS. COMPENSATION DECISIONS ARE MADE ANNUALLY FOR OTHER KEY AND HIGH PAID EMPLOYEES BY SENIOR STAFF ON THE BASIS OF COMPARIBILITY DATA.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 required to be filed along with States</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section C, Line 17 NAS files returns in the states listed on the 990 Part VI Section C Line 17. In addition, NAS files charitable solicitation registrations with a 990 attached in the following states: AL, AK, AR, CO, FL, GA, HI, KY, MA, MI, MN, MS, NH, NJ, NM, ND, OH, OK, PA, RI, TN, UT, WA, WV, WI.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>HOW DOCUMENTS ARE MADE AVAILABLE TO THE PUBLIC</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section C, Line 19 NAS makes its governing documents, conflict of interest policy, and financial statements available to the public upon request. THE GOVERNING DOCUMENTS AND ANNUAL FINANCIAL STATEMENTS ARE ALSO AVAILABLE ON THE ORGANIZATION'S WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Changes in Net assets or Fund Balances</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part XI, Line 9 Amount consists of: unrealized gain on derivatives $690,123 unrealized loss on charitable gift annuities (68,845) ---------- 621,278</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>GULF RESEARCH PROGRAM: SIGNIFICANT INCREASE IN NET ASSETS &amp; Rev.</FormAndLineReferenceDesc>
        <ExplanationTxt>PART X BALANCE SHEET LINES 3 &amp; 28 THE US GOVERNEMENT ANNOUNCED IN 2012 AND EARLY 2013 TWO SETTLEMENT AGREEMENTS CONCERNING THE 2010 DEEPWATER HORIZON DISASTER, ONE WITH BP EXPLORATION AND PRODUCTION INC (BP) AND THE OTHER WITH TRANSOCEAN DEEPWATER, INC (TRANSOCEAN). AS PART OF THESE SETTLEMENT AGREEMENTS, NAS WILL RECEIVE $500 MILLION OVER A 5-YEAR PERIOD TO ESTABLISH A NEW 30-YEAR PROGRAM ON HUMAN HEALTH AND ENVIRONMENTAL PROTECTION IN THE GULF OF MEXICO. BP WILL PAY $350 MILLION OVER 5-YEARS AND TRANSOCEAN WILL PAY $150 MILLION OVER 4-YEARS UNDER THE TERMS OF THE RESPECTIVE SETTLEMENT AGREEMENTS, WHICH AMOUNTS WILL BE INVESTED AND WILL BE FULLY EXPENDED BY THE END OF THE 30-YEAR PERIOD. PRESENT VALUE OF THE BALANCE OF THESE PAYMENTS IS $396.2 MILLION AS OF DECEMBER 31, 2015. THE UNPAID BALANCE DUE FOR EACH AGREEMENT IS REFLECTED IN PLEDGES AND GRANTS RECEIVABLE, NET.</ExplanationTxt>
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