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      <Form990PartVIISectionAGrp>
        <PersonNm>WILLIAM R ASTON</PersonNm>
        <TitleTxt>EXEC DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>185562</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>11875</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>LEONARD R CALLIER</PersonNm>
        <TitleTxt>DEP EXEC DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>170469</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>11289</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>RENE C PEREZ</PersonNm>
        <TitleTxt>EMPLOYEE</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>120873</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>8018</OtherCompensationAmt>
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      <TotalReportableCompFromOrgAmt>542854</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>31182</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>3</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
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      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <CntrctRcvdGreaterThan100KCnt>0</CntrctRcvdGreaterThan100KCnt>
      <GovernmentGrantsAmt>834690</GovernmentGrantsAmt>
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      <TotalContributionsAmt>881443</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>FEES FOR SERVICES</Desc>
        <BusinessCd>621910</BusinessCd>
        <TotalRevenueColumnAmt>9544702</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>9544702</RelatedOrExemptFuncIncomeAmt>
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      <TotalProgramServiceRevenueAmt>9544702</TotalProgramServiceRevenueAmt>
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        <ExclusionAmt>188345</ExclusionAmt>
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      <OtherRevenueMiscGrp>
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        <ExclusionAmt>188345</ExclusionAmt>
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        <ManagementAndGeneralAmt>353243</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>206854</ProgramServicesAmt>
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        <ProgramServicesAmt>635949</ProgramServicesAmt>
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        <TotalAmt>398792</TotalAmt>
        <ProgramServicesAmt>398792</ProgramServicesAmt>
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      <FeesForServicesLegalGrp>
        <TotalAmt>20498</TotalAmt>
        <ManagementAndGeneralAmt>20498</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>28080</TotalAmt>
        <ManagementAndGeneralAmt>28080</ManagementAndGeneralAmt>
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      <FeesForServicesOtherGrp>
        <TotalAmt>90310</TotalAmt>
        <ProgramServicesAmt>90310</ProgramServicesAmt>
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      <AdvertisingGrp>
        <TotalAmt>4098</TotalAmt>
        <ProgramServicesAmt>4098</ProgramServicesAmt>
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      <OfficeExpensesGrp>
        <TotalAmt>171260</TotalAmt>
        <ManagementAndGeneralAmt>171260</ManagementAndGeneralAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>107789</TotalAmt>
        <ProgramServicesAmt>107789</ProgramServicesAmt>
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      <OccupancyGrp>
        <TotalAmt>82923</TotalAmt>
        <ProgramServicesAmt>82923</ProgramServicesAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>12972</TotalAmt>
        <ProgramServicesAmt>12972</ProgramServicesAmt>
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      <InterestGrp>
        <TotalAmt>16343</TotalAmt>
        <ProgramServicesAmt>16343</ProgramServicesAmt>
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      <DepreciationDepletionGrp>
        <TotalAmt>182739</TotalAmt>
        <ProgramServicesAmt>182739</ProgramServicesAmt>
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      <InsuranceGrp>
        <TotalAmt>228400</TotalAmt>
        <ManagementAndGeneralAmt>228400</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>AMBULANCE EXPENSE</Desc>
        <TotalAmt>1257086</TotalAmt>
        <ProgramServicesAmt>1257086</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>REPAIRS &amp; MAINTENANCE</Desc>
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        <ProgramServicesAmt>437621</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>BANK CHARGES</Desc>
        <TotalAmt>112149</TotalAmt>
        <ProgramServicesAmt>112149</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>TELEPHONE EXPENSE</Desc>
        <TotalAmt>90306</TotalAmt>
        <ProgramServicesAmt>67729</ProgramServicesAmt>
        <ManagementAndGeneralAmt>22577</ManagementAndGeneralAmt>
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      <AllOtherExpensesGrp>
        <TotalAmt>179305</TotalAmt>
        <ProgramServicesAmt>173086</ProgramServicesAmt>
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      <TotalFunctionalExpensesGrp>
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        <EOYAmt>2375707</EOYAmt>
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      <AccountsReceivableGrp>
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      <LandBldgEquipBasisNetGrp>
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      <AccountsPayableAccrExpnssGrp>
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      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
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      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
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      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>12382416</BOYAmt>
        <EOYAmt>13705694</EOYAmt>
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      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>1319798</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>-1</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
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        <CurrentTaxYearMinus3YearsAmt>1873454</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>2515242</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>892059</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>881443</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus2YearsAmt>2515242</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>892059</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>881443</CurrentTaxYearAmt>
        <TotalAmt>8227411</TotalAmt>
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      <PublicSupportTotal170Amt>8227411</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
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        <CurrentTaxYearMinus3YearsAmt>18320</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>13450</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>93263</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>188345</CurrentTaxYearAmt>
        <TotalAmt>364184</TotalAmt>
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      <OtherIncome170Grp>
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        <CurrentTaxYearMinus3YearsAmt>15472</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>16684</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>22613</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>41950</CurrentTaxYearAmt>
        <TotalAmt>112931</TotalAmt>
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      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, PART II, LINE 10, EXPLANATION OF OTHER INCOME:</FormAndLineReferenceDesc>
        <ExplanationTxt>MEDICAL RECORDS - 2019 AMOUNT: $ 15,552. 2020 AMOUNT: $ 14,812. 2021 AMOUNT: $ 15,871. 2022 AMOUNT: $ 22,208. 2023 AMOUNT: $ 41,950. MISCELLANEOUS - 2019 AMOUNT: $ 660. 2020 AMOUNT: $ 660. 2021 AMOUNT: $ 813. 2022 AMOUNT: $ 405.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
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        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
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        <BookValueAmt>245002</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>2091723</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>1212393</DepreciationAmt>
        <BookValueAmt>879330</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>10046790</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>8576985</DepreciationAmt>
        <BookValueAmt>1469805</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>2594137</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>ACCUMULATED COMPENSATED ABSENCES</Desc>
        <Amt>350543</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>350543</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION QUALIFIES AS A TAX-EXEMPT ORGANIZATION UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AND THEREFORE HAS NO PROVISION FOR INCOME TAXES. THE ORGANIZATION IS NOT CLASSIFIED AS A PRIVATE FOUNDATION UNDER SECTION 509(A). AS OF SEPTEMBER 30, 2023, THE FOUNDATION REPORTS NO UNCERTAIN TAX POSITIONS AND THEREFORE HAS NOT RECORDED ANY UNRECOGNIZED TAX BENEFITS OR LIABILITIES. THE FOUNDATION'S INCOME TAX RETURNS ARE SUBJECT TO EXAMINATION BY THE APPROPRIATE TAX JURISDICTIONS. AS OF SEPTEMBER 30, 2023, THE FOUNDATION'S TAX RETURNS GENERALLY REMAIN OPEN FOR THE LAST THREE YEARS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
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      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
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      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
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        <PersonNm>WILLIAM R ASTON</PersonNm>
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        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
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        <NontaxableBenefitsFilingOrgAmt>11875</NontaxableBenefitsFilingOrgAmt>
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        <TotalCompensationFilingOrgAmt>197437</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LEONARD R CALLIER</PersonNm>
        <TitleTxt>DEP EXEC DIRECTOR</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>11289</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>181758</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="RetDoc1042800001">
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        <NameOfInterested>
          <PersonNm>MICHAEL T MOHUN MD</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>DIRECTOR</RelationshipDescriptionTxt>
        <TransactionAmt>37700</TransactionAmt>
        <TransactionDesc>MEDICAL DIRECTOR FEES</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <PersonNm>EDUARDO URIBE</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>DIRECTOR</RelationshipDescriptionTxt>
        <TransactionAmt>28250</TransactionAmt>
        <TransactionDesc>MEDICAL DIRECTOR FEES</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE IRS FORM 990 IS REVIEWED BY THE COMPTROLLER, EXECUTIVE DIRECTOR, AND DEPUTY DIRECTOR OF EMS BEFORE IT IS FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH YEAR SIGNED CONFLICT OF INTEREST STATEMENTS ARE OBTAINED FROM THE GOVERNING BODY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH YEAR THE GOVERNING BODY REVIEWS AND ADOPTS AN ANNUAL BUDGET.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 18</FormAndLineReferenceDesc>
        <ExplanationTxt>SOUTH TEXAS EMERGENCY CARE FOUNDATION, INC. (STEC) FILES ITS ANNUAL FORM 990 RETURN WITH THE INTERNAL REVENUE SERVICE (IRS). CANDID, A 501(C)(3) NONPROFIT ORGANIZATION, RECEIVES STEC'S FORM 990 RETURNS DIRECTLY FROM THE IRS AND UPLOADS THEM ON ITS GUIDESTAR WEBSITE. ONCE RECEIVED AND UPLOADED, STEC'S RETURNS ARE AVAILABLE AND CAN BE VIEWED BY THE PUBLIC AT HTTPS://WWW2.GUIDESTAR.ORG/PROFILE/74-2028156. A COPY OF THE FORM 1023 FILED WITH THE IRS IS ALSO AVAILABLE ON THE GUIDESTAR WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL PUBLIC INFORMATION IS AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>ROUNDING -1.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>