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      <FootnoteTextInd>X</FootnoteTextInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III, Line 1a: If organization elected under SFAS 116 to not report are, historical treasures, o</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MONTGOMERY COUNTY HISTORICAL SOCIETY'S PERMANENT, ACCESSIONED COLLECTIONS CONSIST OF ARTIFACTS, IMAGES, BOOKS, AND ARCHIVAL MATERIAL RELEVANT TO THE COUNTY'S HISTORY FROM THE PRE-COLONIAL ERA TO TODAY. THESE COLLECTIONS ARE HELD IN TRUST FOR THE PUBLIC. MCHS HAS A COLLECTIONS POLICY IN PLACE, APPROVED BY THE BOARD OF DIRECTORS, WHICH GOVERNS THE ACQUISITION AND PRESERVATION OF ITEMS IN THE COLLECTION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III, Line 4: Description of organization's collections and how it furthers its purpose.</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE ARE TWO SUBCATEGORIES OF COLLECTIONS - LIBRARY AND MUSEUM. THE LIBRARY COLLECTION CONSISTS OF BOOKS AND RECORDS RELATING TO MONTGOMERY COUNTY HISTORY. THE MUSEUM COLLECTION INCLUDES MEDICAL ARTIFACTS, SOCIAL HISTORY COLLECTIONS AND DECORATIVE ARTS. THE GOAL OF THE COLLECTIONS ARE TO PRESERVE THE HISTORY OF MONTGOMERY COUNTY, ASSEMBLE ARTICLES ILLUSTRATIVE OF HISTORICAL CHANGES IN THE COUNTY, AND TO PROVIDE THE WHEREWITHAL TO BRING THE SOCIETY MUSEUMS AND EVENTS ALIVE AND MAKE THEM MEANINGFUL TO THE GENERAL PUBLIC.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X : FIN48 Footnote</FormAndLineReferenceDesc>
        <ExplanationTxt>AS OF JUNE 30, 2025, THE MONTGOMERY COUNTY HISTORICAL SOCIETY HAD NO UNCERTAIN TAX POSITIONS THAT QUALIFY FOR EITHER RECOGNITION OR DISCLOSURE IN THE FINANCIAL STATEMENTS. THE TAX YEARS SUBJECT TO EXAMINATION BY THE TAXING AUTHORITIES ARE THE YEARS ENDED JUNE 30, 2022 THROUGH 2024.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>By Laws updated in January 2025</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>990 TAX RETURN IS DISTRIBUTED TO THE GOVERNING BOARD ELECTRONICALLY TO INDIVIDUAL EMAIL ADDRESSES.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>An affirmation of compliance and disclosure form is signed by each board member annually along with a conflict of interest disclosure statement</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION FOR MONTGOMERY COUNTY HISTORICAL SOCIETY'S TOP EMPLOYEES IS DETERMINED BY COMPARISON TO OTHER SIMILAR ORGANIZATIONS AND APPROVED BY THE BOARD OF DIRECTORS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC BY REQUEST.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c</FormAndLineReferenceDesc>
        <ExplanationTxt>NO CHANGE TO THE PROCESS DURING THE YEAR</ExplanationTxt>
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