﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2016v3.0" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2018-06-14T14:25:05-07:00</ReturnTs>
    <TaxPeriodEndDt>2017-07-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmName>
        <BusinessNameLine1Txt>ELIZABETH H NELSON CPA</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>20351 HIGHWAY 6</AddressLine1Txt>
        <CityNm>MANVEL</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>77578</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2016-08-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>760445652</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>EC MASON PTO</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>ECMA</BusinessNameControlTxt>
      <PhoneNum>2812452832</PhoneNum>
      <USAddress>
        <AddressLine1Txt>PO BOX 278</AddressLine1Txt>
        <CityNm>MANVEL</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>77578</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>TRACY EHLINGER</PersonNm>
      <PersonTitleTxt>PRESIDENT</PersonTitleTxt>
      <PhoneNum>2812452832</PhoneNum>
      <SignatureDt>2017-11-01</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>ELIZABETH H NELSON</PreparerPersonNm>
      <PhoneNum>2814890388</PhoneNum>
      <PreparationDt>2018-06-14</PreparationDt>
      <SelfEmployedInd>X</SelfEmployedInd>
    </PreparerPersonGrp>
    <TaxYr>2016</TaxYr>
    <BuildTS>2022-09-23 18:48:47Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="4">
    <IRS990EZ documentId="00000001" referenceDocumentName="IRS990ScheduleO ReasonableCauseExplanation TransfersPersonalBenefitsContractsDeclaration">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="00000002" referenceDocumentName="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>64747</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>2014</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>0</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>1229</MembershipDuesAmt>
      <InvestmentIncomeAmt>0</InvestmentIncomeAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <GainOrLossFromSaleOfAssetsAmt>0</GainOrLossFromSaleOfAssetsAmt>
      <GamingGrossIncomeAmt>0</GamingGrossIncomeAmt>
      <FundraisingGrossIncomeAmt referenceDocumentId="00000003" referenceDocumentName="IRS990ScheduleG">61504</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>27778</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>33726</SpecialEventsNetIncomeLossAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>0</GrossProfitLossSlsOfInvntryAmt>
      <TotalRevenueAmt>36969</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>36869</GrantsAndSimilarAmountsPaidAmt>
      <FeesAndOtherPymtToIndCntrctAmt>300</FeesAndOtherPymtToIndCntrctAmt>
      <OccupancyRentUtltsAndMaintAmt>352</OccupancyRentUtltsAndMaintAmt>
      <OtherExpensesTotalAmt>153</OtherExpensesTotalAmt>
      <TotalExpensesAmt>37674</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-705</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>5133</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>4428</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>5133</BOYAmt>
        <EOYAmt>4428</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>5133</BOYAmt>
        <EOYAmt>4428</EOYAmt>
      </Form990TotalAssetsGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>5133</BOYAmt>
        <EOYAmt>4428</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>PROVIDE FINANCIAL AND VOLUNTEER SUPPORT TO EC MASON ELEMENTARY SCHOOL</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>PURCHASED EQUIPMENT FOR SCHOOL TO SUPPORT THE SCHOOL IN ITS EFFORTS TO ENCOURAGE CLASSROOM LEARNING. BENEFITED APPROX 850 STUDENTS</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>27708</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>PROVIDED STUDENT ACTIVITIES FOR ALL STUDENTS TO PROMOTE LEARNING OUTSIDE THE CLASSROOM. BENEFITTED APPROX 850 STUDENTS.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>5855</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>PROVIDED A SPECIAL DAY OF APPRECIATION FOR ALL STAFF TO PROMOTE A POSITIVE ENVIRONMENT IN THE SCHOOL. BENEFITED APPROX 850 STUDENTS</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>1106</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>34669</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>TRACY EHLINGER</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>REBECCA KORNDORFFER</PersonNm>
        <TitleTxt>VICE-PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JAIME HEADLEY</PersonNm>
        <TitleTxt>V-PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>LEAH DRUMMER</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>DULCE LADNER</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>KELLY CHAPNICK</PersonNm>
        <TitleTxt>HISTORIAN</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd referenceDocumentName="IRS990ScheduleC">false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd referenceDocumentName="IRS990ScheduleN BinaryAttachment">false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>TX</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>LEAH DRUMMER</PersonNm>
        <USAddress>
          <AddressLine1Txt>7400 LEWIS LANE</AddressLine1Txt>
          <CityNm>MANVEL</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>77578</ZIPCd>
        </USAddress>
        <PhoneNum>2812452832</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
    </IRS990EZ>
    <IRS990ScheduleA documentId="00000002" softwareId="16000371">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <PublicSupportTotal170Amt>0</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <TotalAmt>0</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <PublicSupportCY170Pct>0</PublicSupportCY170Pct>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>5199</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1976</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>3466</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3457</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>2014</CurrentTaxYearAmt>
        <TotalAmt>16112</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>68920</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>62178</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>67830</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>81721</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>61504</CurrentTaxYearAmt>
        <TotalAmt>342153</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>74119</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>64154</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>71296</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>85178</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>63518</CurrentTaxYearAmt>
        <TotalAmt>358265</TotalAmt>
      </Total509Grp>
      <PublicSupportTotal509Amt>358265</PublicSupportTotal509Amt>
      <TotalSupportCalendarYearGrp>
        <TotalAmt>358265</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>1.00000</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>1.00000</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00000</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleG documentId="00000003">
      <FundraisingEventInformationGrp>
        <Event1Nm>CATALOG SALES</Event1Nm>
        <Event2Nm>SPRING CARNIVAL</Event2Nm>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="00000004" softwareId="16000371">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>CHARITABLE; CHARITY; E.C. MASON ELEMENTARY: 7400 LEWIS LANE, MANVEL, TX, 77578; NONE, 36869.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>OFFICE SUPPLIES 153.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>