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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
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      <OtherSecuritiesGrp>
        <Desc>Closely-held equity interests</Desc>
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        <ExplanationTxt>Description of Organization Mission Educational and Recreational Oppportunities.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>Board members Joseph C Morse and J. Carlton Morse are father and son, as well as business partners.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 8b</FormAndLineReferenceDesc>
        <ExplanationTxt>No committee has the authority to act on behalf of the governing board.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A subcommittee of the Board reviews the completed Form 990 prior to its filing. The committee then presents its findings to the complete Board.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>The Executive Director maintains current copies of the conflict of interest statements signed by each Board member. If a potential conflict arises, that Board member abstains from participating in the deliberations and the vote.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board is repsonsible for approving all employee compensation.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19c</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990 and other financial documents are available to the public on various charity evaluator websites. The required organization documents of Organization will be available for inspection and copying at the Organizations office during normal business hours at no charge. The public inspection copy of the Organizations Form 990 will not include the Scheule B names and addresses of contributors. The Organization will make its best effort to ensure that the most current docuements are available for public inspectiion.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part I, Line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>All MTRP City of San Diego Visitor Center volunteers became MTRP Foundation volunteers in 2019.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>Donated rent of 240,000 is excluded per IRS regulations.</ExplanationTxt>
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</Return>