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        <FormAndLineReferenceDesc>EXPLANATION FOR FORM 990, PAGE 6, PART VI, LINE 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>PER THE TRUST DOCUMENT, THE ORGANIZATION SHALL AT ALL TIMES BE COMPOSED OF THREE PUBLIC CHARITY TRUSTEES AND TWO DONOR TRUSTEES. THE PUBLIC CHARITY TRUSTEES SHALL SERVE AT THE PLEASURE OF THE PUBLIC CHARITY AND MAY BE REMOVED BY THE PUBLIC CHARITY AT ANY TIME WITHOUT CAUSE. SAME THING GOES WITHIN THE DONOR TRUSTEES GROUP. IF ANY TRUSTEE FAILS OR CEASES TO ACT AS SUCH, THE PERSON OR ENTITY DESIGNATED BY THE TRUSTEE(WITHIN THE SAME TRUSTEE GROUP) SHALL SERVE AS SUCCESSOR. NO PUBLIC CHARITY TRUSTEE SHALL BE A "DISQUALIFED PERSON" AS DEFINED IN TREASURY REGULATION SECTION 1.509(a)-4(j). THE DONOR TRUSTEE SHALL DESIGNATE A PERSON OR ENTITY TO FILL THE VACANCY (WITHIN THE DONOR TRUSTEE GROUP); BUT IF THE DONOR TRUSTEE</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>EXPLANATION FOR FORM 990, PAGE 6, PART VI, LINE 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>DESIGNATES NO SUCH SUCCESSOR, THE TRUSTEES SHALL PETITION THE KING COUNTY SUPERIOR COURT FOR APPOINTMENT OF A SUCCESSOR IN ACCORDANCE WITH RCW 11.98.039(3) OR ANY AMENDED OR RENUMBERED PROVISION OF THE REVISED CODE OF WASHINGTON.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>EXPLANATION FOR FORM 990, PAGE 6, PART VI, LINE 10b</FormAndLineReferenceDesc>
        <ExplanationTxt>NANCY B BUCK CHARITABLE SUPPORTING FOUNDATION IS A TRUST AND ITS ASSETS ARE CURRENTLY BEING MANAGED BY LAIRD NORTON WETHERBY TRUST COMPANY, THE CORPORATE TRUSTEE. PLEASE REFER TO ARTICLE 9 (GOVERNING LAW) OF THE TRUST DOCUMENT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11-DESCRIPTION OF PROCESS FOR REVIEW</FormAndLineReferenceDesc>
        <ExplanationTxt>LAIRD NORTON WETHERBY TRUST COMPANY, AS CORPORATE TRUSTEE, REVIEWS THE TAX RETURN PREPARED BY ERNST &amp; YOUNG, LLP, THE TAX PREPARER, AND FILES THE RETURN WITH THE INTERNAL REVENUE SERVICE AND WITH THE STATE OF WASHINGTON SECRETARY OF STATE IN A TIMELY MANNER.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>EXPLANATION FOR FORM 990, PAGE 6, PART VI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>NAMES AND ADDRESSES OF THE TRUSTEES WHO CANNOT BE REACHED AT THE ORGANIZATION'S MAILING ADDRESS: DANIEL STEELAR, SONYA STUPEL, SCOTT DEENY, REBECCA GARRETT OF THE NATURE CONSERVANCY IN ARIZONA, 1510 E FORT LOWELL ROAD,TUSCON, AZ 85719-2313, BRUCE REED, 1522 18TH AVE. #302, SEATTLE, WA 98122, DAWN TEUFEL, 1102 E PASEO PAVON, TUCSON, AZ 85718</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TRUST DOES NOT MAKE THESE DOCUMENTS AVAILABLE TO THE PUBLIC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>EXPLANATION FOR FORM 990, PART XI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>DEC 2024 INCOME POSTED IN 2023 - $7395.36 LESS DEC 2022 INCOME POSTED IN 2023 $5564.15, CLOSELY HELD ASSETS FUND BASIS ADJUSTMENTS: -4109.8; 2022 Return of Capital Adjusted in 2023 -2438.99</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>