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        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INSTITUTE DETERMINES WHETHER ITS TAX POSITIONS ARE "MORE-LIKELY-THAN-NOT" TO BE SUSTAINED UPON EXAMINATION BY THE APPLICABLE TAXING AUTHORITY BASED ON THE TECHNICAL MERITS OF THE POSITIONS. AS OF DECEMBER 31, 2024, THE INSTITUTE HAS REVIEWED ITS TAX POSITIONS AND HAS CONCLUDED NO RESERVE FOR UNCERTAIN TAX POSITIONS IS REQUIRED. THE INSTITUTE'S EXEMPT ORGANIZATION INFORMATION RETURNS ARE SUBJECT TO REVIEW THROUGH THREE YEARS AFTER THE DATE OF FILING FOR FEDERAL AND FOUR YEARS AFTER THE DATE OF FILING FOR CALIFORNIA.</ExplanationTxt>
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      <RecipientTable>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INSTITUTE'S PRESIDENT, WILLIAM SYDEMAN, AND THE SECRETARY, HOPE MILLHOLLAND, HAVE A FAMILY RELATIONSHIP.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>A COPY OF THE INFORMATIONAL RETURNS ARE PROVIDED TO THE BOARD FOR REVIEW AND APPROVAL PRIOR TO FILING.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION COMMITTEE IS COMPRISED OF AN ACADEMIC AND A GOVERNMENT SCIENTIST. THEY COMPARE RATES OF PAY FOR SIMILAR POSITIONS IN THE ACADEMIC AND GOVERNMENT ENVIRONMENT, AND REACH A DECISION AS TO PAY AWARDED TO THE EXECUTIVE DIRECTOR.</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>ALL DOCUMENTS ARE AVAILABLE UPON REQUEST.</ExplanationTxt>
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</Return>