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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 1, PART III, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY HAS ELECTED UNDER FASB ASC 958-605-25-19, WORKS OF ART, HISTORICAL TREASURES, AND SIMILAR ITEMS, NOT TO CAPITALIZE ITS COLLECTION OF ART AND ITEMS OF HISTORICAL SIGNIFICANCE. CONTRIBUTIONS OF COLLECTION ITEMS ARE NOT RECOGNIZED BECAUSE THEY ARE ADDED TO COLLECTIONS THAT ARE HELD FOR PUBLIC EXHIBITION, EDUCATION, OR RESEARCH IN FURTHERANCE OF PUBLIC SERVICE RATHER THAN FINANCIAL GAIN; ARE PROTECTED, KEPT UNENCUMBERED, CARED FOR, AND PRESERVED. WHILE THE COLLECTION WAS ORIGINALLY ASSEMBLED BY DONATIONS, ORGANIZED COLLECTING IS NOW CONDUCTED TO ENSURE A RICH ASSORTMENT OF PANHANDLE HISTORY. EXPENDITURES FOR THE PURCHASE OF COLLECTION ITEMS ARE RECORDED AS DECREASES IN NET ASSETS WITHOUT DONOR RESTRICTIONS IF PURCHASED WITH ASSETS NOT SUBJECT TO DONOR RESTRICTIONS AND AS DECREASES IN NET ASSETS RESTRICTED FOR PURPOSE IF PURCHASED WITH DONOR RESTRICTED ASSETS. PROCEEDS FROM THE SALE OF COLLECTION ITEMS ARE SUBJECT TO A POLICY THAT REQUIRES THEM TO BE USED TO SUPPORT OTHER ITEMS FOR THE COLLECTION AND ARE RECORDED AS INCREASES IN ASSETS RESTRICTED FOR PURPOSE. BOTH THE EXPENSE AND REVENUE, IF ANY, FROM THESE TRANSACTIONS ARE REPORTED ON THE STATEMENTS OF ACTIVITIES AND CHANGES IN NET ASSETS SEPARATELY FROM GENERAL REVENUES AND EXPENSES OF THE SOCIETY.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 3, PART X</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY IS EXEMPT FROM FEDERAL INCOME TAX UNDER SECTION 501(A) AS A SOCIETY DESCRIBED IN SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE (THE CODE) AND HAS BEEN DETERMINED NOT TO BE A PRIVATE FOUNDATION UNDER SECTION 509(A) OF THE CODE. AS A RESULT, INCOME TAXES ARE NOT INCLUDED IN THE ACCOMPANYING FINANCIAL STATEMENTS.THE SOCIETY COMPLIES WITH FASB ASC TOPIC 740, ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES (ASC 740), WHICH ADDRESSES THE DETERMINATION OF WHETHER TAX BENEFITS CLAIMED OR EXPECTED TO BE CLAIMED ON A TAX RETURN SHOULD BE RECORDED IN THE FINANCIAL STATEMENTS. UNDER THIS GUIDANCE, THE SOCIETY MAY RECOGNIZE THE TAX BENEFIT FROM AN UNCERTAIN TAX POSITION ONLY IF IT IS MORE-LIKELY-THAN-NOT THAT THE TAX POSITION WILL BE SUSTAINED ON EXAMINATION BY TAXING AUTHORITIES, BASED ON THE TECHNICAL MERITS OF THE POSITION. THE TAX BENEFITS RECOGNIZED IN THE FINANCIAL STATEMENTS FROM SUCH POSITION ARE MEASURED BASED ON THE LARGEST BENEFIT THAT HAS A GREATER THAN 50% LIKELIHOOD OF BEING REALIZED UPON ULTIMATE SETTLEMENT. THE GUIDANCE ON ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES ALSO ADDRESSES DE-RECOGNITION, CLASSIFICATION, INTEREST AND PENALTIES ON INCOME TAXES, AND ACCOUNTING IN INTERIM PERIODS. THE SOCIETY EVALUATES ANY UNCERTAIN TAX POSITIONS USING THE PROVISIONS OF FASB ASC 450, CONTINGENCIES. ACCORDINGLY, A LOSS CONTINGENCY IS RECOGNIZED WHEN IT IS PROBABLE THAT A LIABILITY HAS BEEN INCURRED AS OF THE DATE OF THE FINANCIAL STATEMENTS AND THE AMOUNT OF THE LOSS CAN BE REASONABLY ESTIMATED. MANAGEMENT EVALUATED THE SOCIETY'S TAX POSITIONS AND CONCLUDED THAT THE SOCIETY HAD TAKEN NO UNCERTAIN TAX POSITIONS THAT REQUIRE ADJUSTMENT TO THE FINANCIAL STATEMENTS TO COMPLY WITH THE PROVISIONS OF THIS GUIDANCE. WITH FEW EXCEPTIONS, THE SOCIETY IS NO LONGER SUBJECT TO INCOME TAX EXAMINATIONS BY THE U.S. FEDERAL TAX AUTHORITIES FOR YEARS ENDING BEFORE AUGUST 31, 2021.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 4, PART XI, LINE 2D</FormAndLineReferenceDesc>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 4, PART XII, LINE 2D</FormAndLineReferenceDesc>
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        <FormAndLineReferenceDesc>SCHEDULE M, PAGE 1, PART I, LINE 33</FormAndLineReferenceDesc>
        <ExplanationTxt>PPHS REPORTED ZERO ON FORM 990, PART VIII, LINE 1G BECAUSE IT DOES NOT CAPITALIZE ITS COLLECTIONS AS ALLOWED UNDER FASB ASC 958-605-25-19.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990 - ORGANIZATION'S MISSION</FormAndLineReferenceDesc>
        <ExplanationTxt>TO COLLECT, PRESERVE, CONSERVE, EXHIBIT AND INTERPRET THE HISTORICAL, ETHNOLOGICAL, CULTURAL, AND SCIENTIFIC HERITAGE OF THE PANHANDLE-PLAINS REGION OF TEXAS AND RELTAED AREAS OF THE SOUTHWEST; TO OPERATE AND MAINTAIN THE PANHANDLE-PLAINS HISTORICAL MUSEUM IN ACCORDANCE WITH THE RULES AND REGULATIONS OF THE TEXAS A&amp;M UNIVERSITY BOARD OF REGENTS; TO ENLIST INTEREST AND SUPPORT IN ACHIEVING THE MISSION; AND TO UNDERTAKE OTHER RELATED ACTIVITIES.</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>A COPY OF THE TAX RETURN IS PROVIDED TO THE EXECUTIVE COMMITTEE PRIOR TO FILING. ANY QUESTIONS THAT MAY ARISE ARE ANSWERED BY THE PREPARER. THE RETURN IS THEN FILED.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION IS APPROVED BY THE PRESIDENT OF WEST TEXAS A&amp;M UNIVERSITY.</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>ITEMS ARE MADE AVAILABLE UPON REQUEST.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>IN-KIND CONTRIBUTIONS WTAMU 1,432,448 DIRECT FUNDRAISING EXP NETTED AGAINST REVENUE ON F/S 92,888 COGS NETTED AGAINST REVENUE ON F/S 30,527 IN-KIND CONTRIBUTIONS WTAMU -1,432,448 DIRECT FUNDRAISING EXP NETTED AGAINST REVENUE ON F/S -92,888 COGS NETTED AGAINST REVENUE ON F/S -30,527</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>