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      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueSubtotalAmt>2817778</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 1A:</FormAndLineReferenceDesc>
        <ExplanationTxt>IN CONFORMITY WITH THE PRACTICE FOLLOWED BY MANY MUSEUMS, ART OBJECTS PURCHASED BY THE MUSEUM OR DONATED TO THE MUSEUM FOR ITS EXHIBITS ARE NOT INCLUDED IN THE ACCOMPANYING STATEMENT OF FINANCIAL POSITION. PURCHASES OF ART OBJECTS ARE RECORDED AS DECREASES IN NET ASSETS IN THE STATEMENT OF ACTIVITIES. COSTS ASSOCIATED WITH THE PERMANENT COLLECTION AND OUTDOOR SCULPTURES ARE EXPENSED WHEN INCURRED.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MUSEUM'S MISSION IS TO ENCOURAGE AND PROMOTE THE APPRECIATION OF FINE ART TO PEOPLE IN ITS SURROUNDING COMMUNITIES AND BEYOND. THE MUSEUM IS DEDICATED TO FOSTERING A DEEPER UNDERSTANDING OF THE ARTS, WITH PARTICULAR EMPHASIS ON THE 19TH, 20TH AND 21ST CENTURIES, TO ENHANCING AND ADDING TO ITS OUTDOOR SCULPTURE GARDEN, TO WIDENING THE APPEAL OF THE ART SPACE FOR CHILDREN, TO CONTINUING TO IMPROVE ITS HISTORIC GARDENS AND TO KEEPING AN ACTIVE SCHEDULE OF EXHIBITIONS AND EDUCATIONAL PROGRAMS FOR PEOPLE OF ALL AGES AND BACKGROUNDS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MUSEUM IS AN ORGANIZATION DESCRIBED UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE (THE "CODE") AND IS THEREFORE EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(A) OF THE CODE. THE MUSEUM IS ALSO EXEMPT UNDER ARTICLE 7-A OF THE EXECUTIVE LAW (ARTICLE 7-A) AND SECTION 8-1.4 OF THE ESTATES POWERS AND TRUSTS LAW (EPTL) OF THE STATE OF NEW YORK. ACCORDINGLY, NO PROVISION FOR FEDERAL OR STATE INCOME TAX HAS BEEN PRESENTED IN THE ACCOMPANYING FINANCIAL STATEMENTS. THE MUSEUM FOLLOWS THE PROVISIONS OF FASB ASC, INCOME TAXES. THE STANDARD PRESCRIBES A MINIMUM RECOGNITION THRESHOLD AND MEASUREMENT METHODOLOGY THAT A TAX POSITION TAKEN OR EXPECTED TO BE TAKEN IN A TAX RETURN IS REQUIRED TO MEET BEFORE BEING RECOGNIZED IN THE FINANCIAL STATEMENTS. IT ALSO PROVIDES GUIDANCE FOR DERECOGNITION, CLASSIFICATION, INTEREST AND PENALTIES, ACCOUNTING IN INTERIM PERIODS, DISCLOSURE, AND TRANSITION AS THEY RELATE TO THOSE TAX POSITIONS. THE MUSEUM DOES NOT EXPECT A SIGNIFICANT INCREASE OR DECREASE TO THE TOTAL AMOUNTS OF UNRECOGNIZED TAX POSITIONS DURING THE YEAR ENDED DECEMBER 31, 2025. HOWEVER, THE MUSEUM IS SUBJECT TO AUDIT BY TAX AUTHORITIES, INCLUDING A REVIEW OF ITS NONPROFIT STATUS, WHICH MANAGEMENT BELIEVES WOULD BE UPHELD UPON EXAMINATION. NONETHELESS, THE AMOUNTS ULTIMATELY PAID, IF ANY, UPON RESOLUTION OF THE ISSUES RAISED BY THE TAXING AUTHORITIES MAY DIFFER MATERIALLY FROM THE AMOUNTS ACCRUED FOR EACH YEAR. AS REQUIRED BY LAW, THE MUSEUM FILES INFORMATIONAL RETURNS WITH BOTH THE UNITED STATES FEDERAL AND STATE OF NEW YORK JURISDICTIONS ON AN ANNUAL BASIS - FORM 990 WITH THE INTERNAL REVENUE SERVICE, AND FORM CHAR-500 WITH THE STATE. THESE RETURNS ARE SUBJECT TO EXAMINATION BY THESE AUTHORITIES WITHIN CERTAIN STATUTORILY DEFINED PERIODS FROM THE LATEST FILING DATE FOR FEDERAL AND FOR THE STATE OF NEW YORK.</ExplanationTxt>
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        <Event1Nm>DECO PARTY</Event1Nm>
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        <CharitableContriEvent1Amt>74898</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>78440</GrossRevenueEvent1Amt>
        <RentFacilityCostsEvent1Amt>5000</RentFacilityCostsEvent1Amt>
        <FoodAndBeverageEvent1Amt>47925</FoodAndBeverageEvent1Amt>
        <EntertainmentEvent1Amt>6400</EntertainmentEvent1Amt>
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        <GrossRevenueTotalEventsAmt>78440</GrossRevenueTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>5000</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>47925</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>6400</EntertainmentTotalEventsAmt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>NASSAU COUNTY MUSEUM OF ART HAS ITS FORM 990 PREPARED BY AN OUTSIDE ACCOUNTING FIRM AND HAS ESTABLISHED THE FOLLOWING REVIEW PROCESS TO ENSURE THAT THE INFORMATION REPORTED IS COMPLETE AND ACCURATE. WHEN THE FORM 990 HAS BEEN PREPARED, REVIEWED BY MANAGEMENT AND IS READY TO BE FILED WITH THE INTERNAL REVENUE SERVICE, IT IS PROVIDED TO THE MEMBERS OF THE MUSEUMS GOVERNING BODY FOR ANY COMMENTS PRIOR TO ITS SUBMISSION. THE GOVERNING BODY IS PROVIDED WITH A REASONABLE AMOUNT OF TIME TO REVIEW THE FORM 990. ANY COMMENTS ARE THEN GROUPED, SUMMARIZED AND PROVIDED THROUGH MANAGEMENT TO THE OUTSIDE ACCOUNTING FIRM. ANY APPLICABLE ISSUES ARE ADDRESSED PRIOR TO RETURN BRING FINALIZED AND APPROVED FOR FILING.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>NASSAU COUNTY MUSEUM OF ART CURRENTLY HAS IN PLACE A CONFLICT OF INTEREST POLICY WHICH IT REGULARLY MONITORS AND ENFORCES. THE BOARD MANDATES THAT ALL MEMBERS OF MANAGEMENT AND THE GOVERNING BODY ANNUALLY SIGN A CONFLICT OF INTEREST POLICY AND DISCLOSE ANY POTENTIAL OR ACTUAL CONFLICTS THAT MAY EXIST. IF A POTENTIAL OR ACTUAL CONFLICT OF INTEREST EXISTS, GOVERNING BODY AND MANAGEMENT WILL INVESTIGATE THE ISSUE. IF A CONFLICT OF INTEREST IS DETERMINED TO EXIST MANAGEMENT AND THE GOVERNING BODY WILL BE NOTIFIED IMMEDIATELY. THE MEMBER WILL NOT BE ALLOWED TO VOTE OR BE A PART OF ANY DECISIONS ABOUT ANY SUCH TRANSACTIONS THAT HAVE TO DO WITH THE CONFLICT UNTIL SUCH TIME THAT THERE IS NO LONGER A CONFLICT.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>NASSAU COUNTY MUSEUM OF ART MAKES ITS FORM 990 AVAILABLE FOR PUBLIC INSPECTION AS REQUIRED UNDER SECTION 6104 OF THE INTERNAL REVENUE CODE UPON WRITTEN REQUEST AT THE MUSEUMS OFFICE AT ONE MUSEUM DRIVE ROSLYN HARBOR, NY 11576. IN ADDITION FORM 1023 AS WELL AS THE FINANCIAL STATEMENTS, AND CONFLICT OF INTEREST POLICY ARE AVAILABLE UPON WRITTEN REQUEST AT THE MUSEUMS OFFICE AT ONE MUSEUM DRIVE ROSLYN HARBOR, NY 11576.</ExplanationTxt>
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