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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>IZFS CONTRACTS WITH EXECUTIVE DIRECTOR, INC. A FOR-PROFIT MANAGEMENT COMPANY TO PROVIDE OFFICE FACILITIES, MANAGEMENT, RECORD KEEPING, ACCOUNTING, STORAGE, AND OTHER SIGNIFICANT SERVICES, PLUS RELATED OVERHEAD COSTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>IZFS HAS FIVE LEVELS OF MEMBERSHIP; REGULAR, STUDENT, POSTDOCTORAL, ASSOCIATE AND CORPORATE. ALL MEMBERS ARE ABLE TO SERVE ON COMMITTEES AND TASK FORCES. ONLY REGULAR MEMBERS ARE ELIGIBLE TO BE ELECTED TO OFFICE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE OFFICERS ARE ELECTED BY MEMBERS. ALL REGULAR, POST-DOC AND STUDENT MEMBERS ARE ELIGIBLE TO VOTE FOR THE OFFICERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNANCE DECISIONS ARE SUBJECT TO THE APPROVAL OF THE OFFICERS AND BOARD MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 990 IS REVIEWED BY THE BOARD OF DIRECTORS PRIOR TO BEING FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>IZFS BEGINS EACH COMMITTEE AND LEADERSHIP MEETING WITH A CALL FOR CONFLICTS. THE BOARD ENCOURAGES OPEN DISCUSSION OF ANY POTENTIAL CONFLICT OF INTEREST, WITH THE FIRST STEP BEING IN THE CASE OF A KNOWN CONFLICT, A BOARD MMEBER RECUSING THEMSELVES FROM VOTING ON A PARTICULAR ITEM. REFUSAL TO RECUSE MAY LEAD THE BOARD TO DECIDE A PARTICULAR MEMBER SHOULDN'T VOTE ON A PARTICULAR DECISION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>IZFS MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>