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      <ProgramServiceRevenueGrp>
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      <FootnoteTextInd>X</FootnoteTextInd>
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        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY HAS ADOPTED THE PROVISIONS OF ASC TOPIC 740, INCOME TAXES, RELATING TO THE ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES. THE SOCIETY FILES AN INFORMATION RETURN IN THE US FEDERAL JURISDICTION. MANAGEMENT IS NOT AWARE OF ANY UNCERTAIN TAX POSITIONS.</ExplanationTxt>
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        <EmployeeCnt>0</EmployeeCnt>
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        <SpecificServicesProvidedTxt>CONFERENCES/RECEPTIONS</SpecificServicesProvidedTxt>
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      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
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      <BoycottCountriesInd>0</BoycottCountriesInd>
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        <FormAndLineReferenceDesc>SCHEDULE F, PART I, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>IN ADDITION TO THOSE ACTIVITIES DISCLOSED IN PART I OF SCHEDULE F, AS AN INTERNATIONAL SOCIETY FORMED TO PROVIDE MEMBERS WITH NETWORKING AND EDUCATION OPPORTUNITIES IN COMMERCIAL AVIATION, ISTAT RECEIVES MEMBERSHIP DUES, CONFERENCE REGISTRATIONS, AND SPONSORSHIPS FROM INDIVIDUALS AND CORPORATIONS WORLDWIDE.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>ISTAT HAS DELEGATED THE MANAGEMENT OF ITS DAILY OPERATIONS TO SMITHBUCKLIN CORPORATION IN CHICAGO. SMITHBUCKLIN CORPORATION IS A MANAGEMENT COMPANY WHICH MANAGES ALL ASPECTS OF THE SOCIETY IN ACCORDANCE WITH ISTAT'S BYLAWS AND POLICIES. OPERATIONS MAY INCLUDE, BUT ARE NOT LIMITED TO, ADMINISTRATION, MEMBERSHIP, FINANCE AND ACCOUNTING, CONVENTION/TRADESHOW/MEETING PLANNING, EDUCATION, MARKETING, AND INFORMATION TECHNOLOGY. SMITHBUCKLIN CORPORATION EMPLOYEES PROVIDE THESE SERVICES.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>ISTAT'S MEMBERSHIP IS COMPRISED OF INDIVIDUALS WHO SUPPORT THE OBJECTIVES OF THE ORGANIZATION AND SHARE A COMMON BUSINESS INTEREST IN FUTHERING SUCH OBJECTIVES. WHILE CORPORATE OR OTHER ENTITIES MAY BE PERMITTED MULTIPLE INDIVIDUAL MEMBERS, SUCH AS CORPORATIONS OR OTHER ENTITIES ARE NOT CONSIDERED MEMBERS IN THEIR OWN RIGHT.</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>ISTAT'S BOARD OF DIRECTORS IS ELECTED BY ITS MEMBERS, ALL OF WHOM ARE ENTITLED TO VOTE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>ISTAT'S 990 IS PREPARED BY INDEPENDENT PUBLIC ACCOUNTANTS AND SUBMITTED TO ITS MANAGEMENT COMPANY FOR INITIAL REVIEW. THE FORMS THEN SUBMITTED TO THE BOARD OF DIRECTORS FOR REVIEW AND DISCUSSION PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>BOARD MEMBERS ARE REQUIRED TO ANNUALLY DISCLOSE ANY CONFLICTS OF INTEREST.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>ISTAT'S GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE AVAILABLE FOR PUBLIC INSPECTION UPON REQUEST</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>ISTAT'S BOARD OF DIRECTORS IS RESPONSIBLE FOR THE OVERSIGHT OF THE AUDIT AND SELECTION OF AN INDEPENDENT ACCOUNTANT. THE PROCESS HAS NOT CHANGED FROM PRIOR YEARS.</ExplanationTxt>
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