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      <TotalEmployeeCnt>1</TotalEmployeeCnt>
      <SubtotalSpentAmt>155175</SubtotalSpentAmt>
      <TotalSpentAmt>155175</TotalSpentAmt>
      <TransferToForeignCorpInd>false</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>false</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>false</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>false</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>false</ForeignPartnershipInd>
      <BoycottCountriesInd>false</BoycottCountriesInd>
    </IRS990ScheduleF>
    <IRS990ScheduleJ documentId="IRS990ScheduleJ" softwareId="23017517" softwareVersionNum="2023v5.0">
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>false</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>false</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>false</CompBsdOnRevRelatedOrgsInd>
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      <CompBsdNetEarnsRltdOrgsInd>false</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>false</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>false</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Alicia Wise</PersonNm>
        <TitleTxt>Executive Dir.</TitleTxt>
        <BaseCompensationFilingOrgAmt>155175</BaseCompensationFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>155175</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="23017517" softwareVersionNum="2023v5.0">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>Management duties were delegated to Information Power Ltd (https://find-and-update.company-information.service.gov.uk/company/06033058). Current directors are Lorraine Estelle and Alicia Wise. Highest compensated employee is Alicia Wise who received a salary of 12,570 in 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The form 990 has been reviewed by a group of persons authorized to review financial and audit matters prior to filing. The final form 990 (filed with the IRS) will be available at the next meeting of the board for inspection. In addition, upon request of any board member, a copy will be provided. If there are any material changes, an amended form 990 will be filed.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>As of September 2023, CLOCKSS implemented a conflict of interest policy. The annual disclosure process will commence in 2024.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The documents are available upon request, and a link is now provided on the homepage of the CLOCKSS website.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
