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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 - ORGANIZATION'S MISSION</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S MISSION IS TO PROMOTE SOCIAL WELFARE, INCLUDING BUT NOT LIMITED TO 1) ADVOCATING FOR STRONGER ENVIRONMENTAL LAWS AND POLICIES TO PROTECT WILDLIFE, THE ENVIRONMENT AND HUMAN HEALTH, 2) EDUCATING THE PUBLIC ABOUT THE IMPORTANCE OF STRONG ENVIRONMENTAL LAWS AND THE THREATS THEY FACE, AND 3) ADVOCATING FOR AND AGAINST LEGISLATORS AND ELECTED OFFICIALS TO FURTHER ADVANCE STRONG ENVIRONMENTAL PROTECTIONS. CENTER ACTION FUND PRIMARILY FOCUSES ON ISSUES RELATING TO PROTECTIONS FOR ENDANGERED SPECIES, PUBLIC LANDS, CLEAN AIR, CLEAN WATER, AND A SAFE CLIMATE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>NO REVIEW WAS OR WILL BE CONDUCTED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>NO DOCUMENTS AVAILABLE TO THE PUBLIC</ExplanationTxt>
      </SupplementalInformationDetail>
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          <StateAbbreviationCd>AZ</StateAbbreviationCd>
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      <LoansOrGuaranteesToOtherOrgInd>false</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>false</LoansOrGuaranteesFromOthOrgInd>
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      <AssetSaleToOtherOrgInd>false</AssetSaleToOtherOrgInd>
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      <AssetExchangeInd>false</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>false</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>false</RentalOfFcltsFromOthOrgInd>
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      <TransferFromOtherOrgInd>false</TransferFromOtherOrgInd>
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</Return>