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      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
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        <CurrentTaxYearMinus2YearsAmt>51579</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>343414</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>236232</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus1YearAmt>16089</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>30005</CurrentTaxYearAmt>
        <TotalAmt>134670</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <OtherIncome170Grp>
        <CurrentTaxYearMinus3YearsAmt>28</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearAmt>18</CurrentTaxYearAmt>
        <TotalAmt>46</TotalAmt>
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      <PublicSupportPY170Pct>0.66700</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>PART II, LINE 10</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER INCOME 28</ExplanationTxt>
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        <ContributorBusinessName>
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        <ContributorUSAddress>
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          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
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      <ProtectionNaturalHabitatInd>X</ProtectionNaturalHabitatInd>
      <PreservationOpenSpaceInd>X</PreservationOpenSpaceInd>
      <TotalEasementsCnt>3</TotalEasementsCnt>
      <TotalAcreageCnt>13.99</TotalAcreageCnt>
      <StatesEasementsHeldCnt>1</StatesEasementsHeldCnt>
      <WrittenPolicyMonitoringInd>false</WrittenPolicyMonitoringInd>
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      <Section170hRqrStsfdInd>true</Section170hRqrStsfdInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 1, PART II, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>CONSERVATION EASEMENTS ARE SPECIFIC RIGHTS HELD BY A THIRD-PARTY SEPARATE FROM THE OWNERSHIP OF THE LAND AND REPRESENT NUMEROUS RESTRICTIONS OVER THE USE AND DEVELOPMENT OF THE LAND BY THE OWNER OF THE PROPERTY. THESE EASEMENTS GENERALLY PROVIDE THAT THE LAND WILL BE MAINTAINED UNIMPAIRED IN ITS CURRENT NATURAL, AGRICULTURAL, SCENIC OR RECREATIONAL STATE, AND MAY REQUIRE PUBLIC ACCESS. THE TRUST MAY HOLD A CONSERVATION EASEMENT ON A PROPERTY THEY DO NOT OWN, OR MAY OWN PROPERTY WHICH HAS A CONSERVATION EASEMENT ON IT HELD BY A GOVERNMENT OR NON-GOVERNMENTAL ORGANIZATION. THE FAIR MARKET VALUE OF EASEMENTS ACQUIRED IS SHOWN IN THE YEAR OF ACQUISITION AS AN ADDITION TO NET ASSETS WITH DONOR RESTRICTIONS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 - ORGANIZATION'S MISSION</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MIDDLESEX LAND TRUST'S MISSION IS TO PRESERVE OPEN SPACE IN NORTHERN MIDDLESEX COUNTY BY IDENTIFYING, PROTECTING, AND MAINTAINING SIGNIFICANT NATURAL FEATURES SUCH AS WETLANDS, SCENIC AREAS, CRITICAL WILDLIFE HABITATS, PRIME FARMLAND AND UNIQUE GEOLOGICAL FORMATIONS. THE LAND TRUSTS ACCEPTS DONATIONS OF PROPERTY AS WELL AS CONSERVATION EASEMENTS TO ENSURE THAT THESE LANDS REMAIN IN OPEN SPACE FOR THE BENEFIT AND ENJOYMENT OF FUTURE GENERATIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS MEMBERS, WHO QUALIFY UPON BOARD APPROVAL AND PAYMENT OF DUES, THAT ARE ALLOWED TO VOTE AT THE ANNUAL MEETING TO APPOINT DIRECTORS TO A TERM ON THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH MEMBER OF THE BOARD RECEIVES A COPY OF THE 990 FOR REVIEW PRIOR TO FILING.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>IN 2023, THE CONFLICT OF INTEREST POLICY WAS SIGNED OFF ON BY ALL BOARD MEMBERS. THE CONFLICT OF INTEREST POLICY IS MONITORED AND REVIEWED ANNUALLY BY THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS APPROVES THE COMPENSATION OF THE EXECUTIVE DIRECTOR AFTER REVIEWING COMPARABLE DATA OF SIMILAR ORGANIZATIONS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL GOVERNING DOCUMENTS ARE MADE AVAILABLE UPON REQUEST WITHIN A REASONABLE AMOUNT OF TIME.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VII</FormAndLineReferenceDesc>
        <ExplanationTxt>ALTERNATE BOARD OF DIRECTORS CAN ONLY VOTE WHEN ANOTHER BOARD MEMBER IS NOT AVAILABLE TO VOTE AND THE DIRECTORS SEAT THEM.</ExplanationTxt>
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      <SupplementalInformationDetail>
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</Return>