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      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INTERNAL REVENUE SERVICE HAS CLASSIFIED 21PSTEM AS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE ("CODE"), AS AN ORGANIZATION, CONTRIBUTIONS TO WHICH ARE DEDUCTIBLE UNDER SECTION 170(C) OF THE CODE; AND AS AN ORGANIZATION THAT IS NOT A PRIVATE FOUNDATION AS DEFINED IN SECTION 509(A) OF THE CODE. U.S. GAAP REQUIRES MANAGEMENT TO EVALUATE TAX POSITIONS TAKEN AND RECOGNIZE A TAX LIABILITY, IF 21PSTEM HAS TAKEN AN UNCERTAIN TAX POSITION THAT MORE LIKELY THAN NOT WOULD NOT BE SUSTAINED UPON EXAMINATION BY A GOVERNMENT AUTHORITY. MANAGEMENT HAS ANALYZED THE TAX POSITIONS TAKEN BY 21PSTEM AND HAS CONCLUDED THAT AS OF DECEMBER 31, 2022 AND 2021, THERE ARE NO UNCERTAIN POSITIONS TAKEN OR EXPECTED TO BE TAKEN THAT WOULD REQUIRE RECOGNITION OF A LIABILITY OR DISCLOSURE IN THE FINANCIAL STATEMENTS. 21PSTEM RECOGNIZES ACCRUED INTEREST AND PENALTIES ASSOCIATED WITH UNCERTAIN TAX POSITIONS, IF ANY, AS PART OF GENERAL AND ADMINISTRATIVE EXPENSES. THERE WERE NO INCOME TAX RELATED INTEREST AND PENALTIES RECORDED FOR EITHER OF THE YEARS ENDED DECEMBER 31, 2022 OR 2021.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>21PSTEM ACCOUNTS FOR EXPENDITURES IN EGYPT USING ACCRUAL BASIS U.S. GAAP.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III ACCOUNTING METHOD:</FormAndLineReferenceDesc>
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        <TitleTxt>CHIEF OF PARTY</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <OtherCompensationFilingOrgAmt>16114</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 WILL BE REVEIWED BY THE BOARD OF DIRECTORS PRIOR TO FILING. THE BOARD OF DIRECTORS MAY COMMENT AND PROPOSE CHANGES OR SUGGESTIONS TO MANAGEMENT.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD MEMBERS AND EMPLOYEES ARE REQUIRED TO REPORT ANY CONFLICTS OF INTEREST AS THEY MAY ARISE. THE POLICY IS REVIEWED ANNUALLY BY A DESIGNATED BOARD COMMITTEE FOR COMPLETENESS AND UP TO DATE RELEVANCE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS SETS COMPENSATION LEVELS FOR THE PRESIDENT. THE BOARD OF DIRECTORS HAS AUTHORIZED THE PRESIDENT TO SET COMPENSATION LEVELS FOR EMPLOYEES BASED ON THE BOARD'S CONSIDERATION OF FUNDING SOURCES, BUDGET IMPLICATIONS AND COMPENSATION OF PEERS. COMPENSATION LEVELS ARE APPROVED ON AN ANNUAL BASIS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>COPIES OF THE ORGANIZATION'S GOVERNING DOCUMENTS, FINANCIAL STATEMENTS AND FORM 990 WILL BE PROVIDED ON REQUEST. THEY ARE ALSO AVAILABLE FOR INSPECTION AT THE ORGANIZATION'S OFFICE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS PROVIDES OVERSIGHT FOR THE AUDIT PROCESS AND IS RESPONSIBLE FOR THE SELECTION OF THE INDEPENDENT ACCOUNTANT. THE PROCESS HAS NOT CHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
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</Return>
