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        <ExclusionAmt>9586</ExclusionAmt>
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        <ProgramServicesAmt>10500</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>1783</ManagementAndGeneralAmt>
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        <Desc>DUES &amp; SUBSCRIPTIONS</Desc>
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        <CurrentTaxYearMinus1YearAmt>7</CurrentTaxYearMinus1YearAmt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
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      <ExpensesNotRptFinclStmtAmt>5000</ExpensesNotRptFinclStmtAmt>
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        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>LSST-DA HAS BEEN RECOGNIZED BY THE INTERNAL REVENUE SERVICE AS A 501(C)(3) ORGANIZATION EXEMPT FROM FEDERAL INCOME TAXES. UNDER INTERNAL REVENUE CODE SECTION 501(A), LSST-DA FOLLOWS THE INCOME TAX STANDARD FOR UNCERTAIN TAX POSITIONS. MANAGEMENT BELIEVES IT HAS NO MATERIAL UNCERTAIN TAX POSITIONS OR ANY RELATED PENALTIES AND INTEREST TO ACCRUE FOR THE YEARS ENDED SEPTEMBER 30, 2022 AND 2021, AND, ACCORDINGLY, THERE IS NO LIABILITY FOR UNRECOGNIZED TAX BENEFITS. TAX YEARS PRIOR TO 2019 ARE NO LONGER SUBJECT TO EXAMINATION BY THE INTERNAL REVENUE SERVICE OR THE APPLICABLE STATE JURISDICTIONS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>LSST, INC. HAS MADE A STRONG COMMITMENT TO PROVIDING EFFECTIVE GRANT OVERSIGHT AND MONITORING THROUGHOUT THE LIFE OF THE GRANT THAT INCLUDES USE OF FUNDS AND REPORTING REQUIREMENTS. THIS MONITORING ENSURES THAT BEST PRACTICES ARE FOLLOWED AND CONFIRMS THAT THE FUNDS ARE SPENT TO ACCOMPLISH THE INTENDED PURPOSE.</ExplanationTxt>
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      <SupplementalInformationDetail>
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      <RecipientTable>
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      <RecipientTable>
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          <CityNm>PULLMAN</CityNm>
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      <RecipientTable>
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      <RecipientTable>
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    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>AMENDED RETURN EXPLANATION</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION IS SUBMITTING AN AMENDED RETURN TO UPDATE THE 990 TO AGREE TO THE AUDITED FINANCIAL STATEMENTS. PARTS VIII, IX, X, XI OF THE CORE FORM 990 HAVE BEEN UPDATED. SCHEDULE A, SCHEDULE B, SCHEDULE F AND SCHEDULE I HAVE BEEN CHANGED AS WELL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>LSST, INC. MEMBERS ARE CALIFORNIA INSTITUTE OF TECHNOLOGY, CARNEGIE MELLON UNIVERSITY, COLUMBIA UNIVERSITY, INSTITUT DE PHYSIQUE NUCLEAIRE ET DE PHYSIQUE DES PARTICULES (IN2P3), JOHNS HOPKINS UNIVERSITY, LAWRENCE LIVERMORE NATIONAL LABORATORY (LLNL), ASSOCIATION OF UNIVERSITIES FOR RESEARCH IN ASTRONOMY, INC. (AURA), NORTHWESTERN UNIVERSITY, PENNSYLVANIA STATE UNIVERSITY, PRINCETON UNIVERSITY, RUTGERS UNIVERSITY, STANFORD LINEAR ACCELERATOR CENTER (SLAC), STANFORD UNIVERSITY-KAVLI INSTITUTE FOR PARTICLE ASTROPHYSICS AND COSMOLOGY (KIPAC), TEXAS A&amp;M UNIVERSITY, UNIVERSITY OF ILLINOIS AT CHAMPAIGN-URBANA (NCSA), UNIVERSITY OF OXFORD, UNIVERSITY OF PENNSYLVANIA, UNIVERSITY OF PITTSBURGH, UNIVERSITY OF WASHINGTON, ISTITUTO NAZIONALE DI ASTROFISICA (INAF), LINEA, MAX PLANCK INSTITUT FUER ASTRONOMIE (MPIA), SCHMIDT (FUTURE ACTION NETWORK), UNIVERSITY OF CALIFORNIA BERKELEY, PURDUE UNIVERSITY, AND YALE UNIVERSITY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 8B</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE ARE NO COMMITTEES WITH AUTHORITY TO ACT ON BEHALF OF THE GOVERNING BODY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 990 IS REVIEWED AND APPROVED BY THE BOARD TREASURER, DIRECTOR, AND PROVIDED TO THE BOARD FOR REVIEW BEFORE SUBMISSION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CONFLICT OF INTEREST POLICY IS MONITORED AND ENFORCED BY AURA.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>AURA'S HUMAN RESOURCES DEPARTMENT PERFORMS A COMPARABILITY DATA ANALYSIS RELATED TO THE DIRECTOR'S COMPENSATION USING VARIOUS TOOLS AND EXTERNAL RESOURCES. THE FINAL COMPENSATION FOR THE DIRECTOR IS REVIEWED AND APPROVED BY THE BOARD OF DIRECTORS. AURA HR DEPARTMENT RETAINS SUCH DOCUMENTATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VII, SECTION A AND SCHEDULE J, PART II:</FormAndLineReferenceDesc>
        <ExplanationTxt>LSST, INC. DOES NOT HAVE ANY EMPLOYEES; HOWEVER, THE EXECUTIVE DIRECTOR AND BOARD SECRETARY OF LSST, INC. ARE COMPENSATED FOR THEIR SERVICES THROUGH THE ASSOCIATION OF UNIVERSITIES FOR RESEARCH IN ASTRONOMY (AURA). AURA IS NOT A RELATED ENTITY TO LSST, INC. HOWEVER, THE EXECUTIVE DIRECTOR'S AND BOARD SECRETARY'S COMPENSATION, SINCE KNOWN, HAVE BEEN LISTED ON PART VII.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>CONSULTING &amp; CONTRACTED SERVICES: PROGRAM SERVICE EXPENSES 137,647. MANAGEMENT AND GENERAL EXPENSES 33,604. FUNDRAISING EXPENSES 1,600. TOTAL EXPENSES 172,851. SERVICES PROVIDED BY AURA: PROGRAM SERVICE EXPENSES 102,894. MANAGEMENT AND GENERAL EXPENSES 306,320. FUNDRAISING EXPENSES 173,866. TOTAL EXPENSES 583,080.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>RETURN OF FUNDS 5,000.</ExplanationTxt>
      </SupplementalInformationDetail>
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</Return>