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        <BusinessNameLine1>NEW YORK INDEPENDENT SYSTEM OPERATOR INC</BusinessNameLine1>
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        <AddressLine1>10 KREY BOULEVARD</AddressLine1>
        <City>RENSSELAER</City>
        <State>NY</State>
        <ZIPCode>12144</ZIPCode>
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      <Name>MARY MCGARVEY</Name>
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        <NamePerson>ROBERT A PIKE</NamePerson>
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        <NamePerson>JOHN A RAVALLI</NamePerson>
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        <NamePerson>RYAN R SMITH</NamePerson>
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        <NamePerson>BELINDA F THORNTON</NamePerson>
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        <NamePerson>BRIAN ZINK</NamePerson>
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        <NamePerson>JOHN M ADAMS</NamePerson>
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        <NamePerson>JOHN P BUECHLER</NamePerson>
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        <NamePerson>KAREN G GACH</NamePerson>
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        <NamePerson>ALEX M SCHNELL</NamePerson>
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        <NamePerson>THOMAS J SHATTUCK</NamePerson>
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        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
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      </Form990ScheduleJPartII>
      <Form990ScheduleJPartIII>
        <Identifier>COMPENSATION OF CEO</Identifier>
        <ReturnReference>SCHEDULE J, PART I, LINE 3</ReturnReference>
        <Explanation>TO DETERMINE THE COMPENSATION OF NYISO'S PRESIDENT AND CHIEF EXECUTIVE OFFICER, NYISO, THROUGH COLLABORATION WITH OTHER INDEPENDENT SYSTEM OPERATORS AND REGIONAL TRANSMISSION ORGANIZATIONS, ENGAGES AN INDEPENDENT EXECUTIVE COMPENSATION FIRM TO PERFORM A BENCHMARK COMPENSATION ASSESSMENT TO AID THE NYISO BOARD OF DIRECTORS IN THEIR REVIEW OF THE PRESIDENT AND CHIEF EXECUTIVE OFFICER'S COMPENSATION. AS PART OF THIS COMPENSATION ASSESSMENT, THE FORM 990 OF OTHER RELEVANT ORGANIZATIONS ( INCLUDING OTHER INDEPENDENT SYSTEM OPERATORS AND REGIONAL TRANSMISSION ORGANIZATIONS ) ARE REVIEWED. THE RESULTS OF THIS ASSESSMENT ARE PROVIDED TO THE COMMERCE AND COMPENSATION COMMITTEE OF THE NYISO BOARD OF DIRECTORS FOR REVIEW ANNUALLY. THE COMMERCE AND COMPENSATION COMMITTEE MAKES A RECOMMENDATION REGARDING THE PRESIDENT AND CHIEF EXECUTIVE OFFICER'S COMPENSATION TO THE BOARD OF DIRECTORS, AND THE BOARD OF DIRECTORS AUTHORIZES THE PRESIDENT AND CHIEF EXECUTIVE OFFICER'S COMPENSATION ANNUALLY. THE PRESIDENT AND CHIEF EXECUTIVE OFFICER HAS A WRITTEN EMPLOYMENT CONTRACT WITH CONDITIONS APPROVED BY THE BOARD OF DIRECTORS.</Explanation>
      </Form990ScheduleJPartIII>
      <Form990ScheduleJPartIII>
        <Identifier>Severance or change-of-control payment</Identifier>
        <ReturnReference>Schedule J, Part I, Line 4a</ReturnReference>
        <Explanation>THOMAS J SHATTUCK RECEIVED $155,000 SEVERANCE PAY DURING 2011 PER HIS SEVERANCE AGREEMENT AT HIS TIME OF TERMINATION IN 2011.</Explanation>
      </Form990ScheduleJPartIII>
      <Form990ScheduleJPartIII>
        <Identifier>Non-fixed payments</Identifier>
        <ReturnReference>Schedule J, Part I, Line 7</ReturnReference>
        <Explanation>AMOUNTS LISTED ON FORM 990, PART VII, FOR NYISO OFFICERS AND EMPLOYEES INCLUDE PAYMENTS MADE AND ACCRUED PURSUANT TO NYISO'S ANNUAL INCENTIVE PROGRAM AND LONG-TERM INCENTIVE PLAN FOR NYISO OFFICERS AND CERTAIN EMPLOYEES.</Explanation>
      </Form990ScheduleJPartIII>
      <Form990ScheduleJPartIII>
        <Identifier>Payments on contract that is subject to the initial contract exception</Identifier>
        <ReturnReference>Schedule J, Part I, Line 8</ReturnReference>
        <Explanation>COMPENSATION REPORTED ON FORM 990, PART VII FOR STEPHEN G. WHITLEY INCLUDES SALARY AND AT RISK COMPENSATION PAYMENTS PAID PURSUANT TO A WRITTEN EMPLOYMENT CONTRACT DATED AS OF JULY 5, 2008 BY WHICH MR. WHITLEY BECAME PRESIDENT AND CHIEF EXECUTIVE OFFICER. MR. WHITLEY HAD NOT PREVIOUSLY BEEN A DISQUALIFIED PERSON WITH RESPECT TO NYISO, AND THE CONTRACT WAS IN EFFECT BEFORE HE RENDERED ANY SERVICES TO NYISO.</Explanation>
      </Form990ScheduleJPartIII>
      <Form990ScheduleJPartIII>
        <Identifier>OFFICERS, DIRECTORS, KEY EMPLOYEES, AND HIGHEST COMPENSATED EMPLOYEES</Identifier>
        <ReturnReference>SCHEDULE J, PART II</ReturnReference>
        <Explanation>- COLUMN C REFLECTS " DEFERRED COMPENSATION", WHICH INCLUDES THE ANNUAL INCREASE IN ACTUARIAL VALUE OF ACCRUED PENSION BENEFITS AND ACCRUED POST RETIREMENT BENEFITS. DEPENDING ON AGE, YEARS OF SERVICE, AND OTHER ACTUARIAL ASSUMPTIONS, CERTAIN INDIVIDUALS MAY REFLECT SIGNIFICANT CHANGES IN THE ACTUARIALLY-COMPUTED VALUE OF THEIR RESPECTIVE PENSION AND POST RETIREMENT BENEFITS. - COLUMN D REFLECTS " NONTAXABLE BENEFITS", WHICH FOR NYISO CONSISTS PRIMARILY OF MEDICAL, DENTAL, AND RELATED BENEFITS.</Explanation>
      </Form990ScheduleJPartIII>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="IRS990ScheduleL" softwareId="11000230" softwareVersion="v2011.1.0">
      <Form990ScheduleLPartIV>
        <NameOfInterestedPerson>
          <NameBusiness>
            <BusinessNameLine1>MICHAEL EGAN</BusinessNameLine1>
          </NameBusiness>
        </NameOfInterestedPerson>
        <Relationship>SPOUSE</Relationship>
        <AmountOfTransaction>162781</AmountOfTransaction>
        <DescriptionOfTransaction>SEE SUPPLEMENTAL INFORMATION</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
      </Form990ScheduleLPartIV>
      <Form990ScheduleLPartIV>
        <NameOfInterestedPerson>
          <NameBusiness>
            <BusinessNameLine1>LAURA GRIBBIN</BusinessNameLine1>
          </NameBusiness>
        </NameOfInterestedPerson>
        <Relationship>SISTER</Relationship>
        <AmountOfTransaction>107786</AmountOfTransaction>
        <DescriptionOfTransaction>SEE SUPPLEMENTAL INFORMATION</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
      </Form990ScheduleLPartIV>
      <Form990ScheduleLPartV>
        <Identifier>DESCRIPTION OF TRANSACTION - MICHAEL EGAN</Identifier>
        <ReturnReference>SCHEDULE L, PART IV, COLUMN (D)</ReturnReference>
        <Explanation>MICHAEL EGAN, A SHIFT SUPERVISOR IN THE NYISO OPERATIONS CONTROL ROOM, IS NOT AN OFFICER AND DOES NOT MEET THE INTERNAL REVENUE SERVICE DEFINITION OF A " KEY EMPLOYEE." DIANE EGAN, NYISO'S CORPORATE SECRETARY AND BOARD SECRETARY, IS AN OFFICER OF THE COMPANY AND IS MARRIED TO MICHAEL EGAN, ANOTHER NYISO EMPLOYEE.</Explanation>
      </Form990ScheduleLPartV>
      <Form990ScheduleLPartV>
        <Identifier>DESCRIPTION OF TRANSACTION - LAURA GRIBBIN</Identifier>
        <ReturnReference>SCHEDULE L, PART IV, COLUMN (D)</ReturnReference>
        <Explanation>LAURA GRIBBIN, A PRODUCT BUSINESS SENIOR ANALYST AT NYISO, IS NOT AN OFFICER AND DOES NOT MEET THE INTERNAL REVENUE SERVICE DEFINITION OF A " KEY EMPLOYEE". WESLEY YEOMANS, NYISO'S VICE PRESIDENT OF OPERATIONS, IS AN OFFICER OF THE COMPANY AND IS LAURA GRIBBIN'S BROTHER, ANOTHER NYISO EMPLOYEE.</Explanation>
      </Form990ScheduleLPartV>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="11000230" softwareVersion="v2011.1.0">
      <GeneralExplanation>
        <Identifier>TOTAL NUMBER OF INDIVIDUALS EMPLOYED IN CALENDAR YEAR 2011</Identifier>
        <ReturnReference>FORM 990, PART V, LINE 2A</ReturnReference>
        <Explanation>NYISO'S RESPONSES TO THESE QUESTIONS INDICATE 572 AS THE TOTAL NUMBER OF EMPLOYEES. AS PER THE FORM 990 INSTRUCTIONS, THIS TOTAL REPRESENTS THE NUMBER OF WAGE FORMS FOR EMPLOYEES ( INCLUDING STUDENT INTERNS AND PART- TIME EMPLOYEES) ON NYISO'S PAYROLL AT ANY POINT DURING 2011. THE TOTAL NUMBER OF NYISO EMPLOYEES AT DECEMBER 31, 2011 WAS 513, MANY OF WHOM ARE PROFESSIONAL POWER SYSTEM ENGINEERS, NERC CERTIFIED SYSTEM OPERATORS, ACCOUNTANTS, ECONOMISTS AND ATTORNEYS. THE TOTAL OF EMPLOYEES WITH BACHELORS AND/OR POSTGRADUATE DEGREES WAS AT AROUND 380. ALL NYISO EMPLOYEES HAVE BEEN SUBJECTED TO EXTENSIVE SECURITY REVIEWS, IN COOPERATION WITH THE UNITED STATES DEPARTMENTS OF ENERGY AND HOMELAND SECURITY.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>MEMBERS OR STOCKHOLDERS</Identifier>
        <ReturnReference>FORM 990, PART VI, LINE 6</ReturnReference>
        <Explanation>THE NYISO DOES NOT HAVE ANY MEMBERS OR STOCKHOLDERS WITH OWNERSHIP RIGHTS IN THE NYISO OR ITS ASSETS. IN ACCORDANCE WITH THE NYISO'S GOVERNING DOCUMENTS, ENTITIES THAT PARTICIPATE IN THE NYISO-ADMINISTERED MARKETS MAY TAKE PART IN A COMMITTEE PROCESS TO DEVELOP THE NYISO'S BUDGET AND MODIFICATIONS TO THE NYISO'S TARIFFS AND PROCEDURES, WHICH ARE THEN RECOMMENDED TO THE NYISO BOARD FOR ITS APPROVAL. THE NYISO BOARD MAINTAINS THE ULTIMATE RESPONSIBILITY FOR THE GOVERNANCE DECISIONS OF THE NYISO.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>ELECT MEMBERS OF THE GOVERNING BODY</Identifier>
        <ReturnReference>FORM 990, PART VI, LINE 7A</ReturnReference>
        <Explanation>THE NYISO BOARD OF DIRECTORS MAKES FINAL DETERMINATIONS TO FILL VACANCIES ON THE BOARD. NYISO STAKEHOLDERS PARTICIPATING IN THE MANAGEMENT COMMITTEE ( NYISO'S HIGHEST RANKING STAKEHOLDER COMMITTEE WITH REPRESENTATIVES FROM GENERATION OWNERS, TRANSMISSION OWNERS, END-USE CONSUMERS, PUBLIC POWER/ENVIRONMENTAL PARTIES, AND OTHER SUPPLIERS ) ASSIST IN THIS PROCESS BY CONDUCTING A SEARCH TO IDENTIFY AT LEAST THREE BOARD CANDIDATES FOR EACH VACANCY THAT MEET THE QUALIFICATIONS SPECIFIED IN THE NYISO'S GOVERNING DOCUMENTS. THE NYISO BOARD MAY SELECT A DIRECTOR FROM THIS LIST, OR IT MAY SEEK A CANDIDATE IDENTIFIED THROUGH ANOTHER SOURCE, SUCH AS AN EXECUTIVE SEARCH FIRM.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>DECISIONS OF THE GOVERNING BODY</Identifier>
        <ReturnReference>FORM 990, PART VI, LINE 7B</ReturnReference>
        <Explanation>AS A GENERAL RULE, THE DECISIONS OF THE NYISO BOARD ARE NOT SUBJECT TO THE APPROVAL OF NYISO STAKEHOLDERS. NOTE THAT IN ACCORDANCE WITH THE NYISO'S GOVERNING DOCUMENTS, NYISO STAKEHOLDERS THAT PARTICIPATE IN THE NYISO'S HIGHEST RANKING STAKEHOLDER COMMITTEE, THE MANAGEMENT COMMITTEE, HAVE TO ENDORSE CHANGES SOUGHT BY THE NYISO BOARD TO THE NYISO'S TARIFFS AND GOVERNING DOCUMENTS TO BE FILED PURSUANT TO SECTION 205 OF THE FEDERAL POWER ACT WITH THE NYISO'S CHIEF REGULATOR - THE FEDERAL ENERGY REGULATORY COMMISSION. HOWEVER, THE NYISO BOARD MAY PURSUE SUCH CHANGES WITHOUT THE MANGEMENT COMMITTEE'S CONCURRENCE BY FILING PURSUANT TO SECTION 206 OF THE FEDERAL POWER ACT.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Review of form 990 by governing body</Identifier>
        <ReturnReference>Form 990, Part VI, Section B, Line 11b</ReturnReference>
        <Explanation>PRIOR TO FILING, THE NYISO FORM 990 IS REVIEWED BY THE CONTROLLER &amp; ASSISTANT TREASURER, VICE PRESIDENT &amp; CHIEF FINANCIAL OFFICER, PRESIDENT &amp; CHIEF EXECUTIVE OFFICER, AS WELL AS, LEGAL COUNSEL. FOLLOWING THE COMPLETION OF REVIEWS BY THESE PARTIES, THE NYISO FORM 990 IS PROVIDED TO THE COMMERCE AND COMPENSATION COMMITTEE OF THE NYISO BOARD OF DIRECTORS ALONG WITH THE REST OF THE BOARD OF DIRECTORS FOR THEIR REVIEW.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Conflict of interest policy</Identifier>
        <ReturnReference>Form 990, Part VI, Section B, Line 12c</ReturnReference>
        <Explanation>THE NYISO REGULARLY AND CONSISTENTLY MONITORS AND ENFORCES COMPLIANCE WITH ITS CONFLICT OF INTEREST POLICY BY PROVIDING TRAINING FOR NEW EMPLOYEES AND ANNUAL TRAINING FOR EXISTING EMPLOYEES, MANAGEMENT AND BOARD MEMBERS. ADDITIONALLY, PROHIBITED INVESTMENT LISTS ARE SENT QUARTERLY TO ALL EMPLOYEES AND BOARD MEMBERS FOR REVIEW TO FACILITATE COMPLETION OF A CONFLICT OF INTEREST SURVEY ON AN ANNUAL BASIS. NYISO MANAGEMENT AND BOARD MEMBERS RECEIVE ANNUAL COMPLIANCE TRAINING COVERING A VARIETY OF COMPLIANCE ISSUES, INCLUDING CONFLICT OF INTEREST. EMPLOYEES ALSO HAVE ACCESS TO A COMPLIANCE HOTLINE AND WHISTLEBLOWER SERVICE SHOULD THEY HAVE A COMPLIANCE QUESTION OR WISH TO REPORT A COMPLIANCE CONCERN.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Process used to establish compensation of top management official</Identifier>
        <ReturnReference>Form 990, Part VI, Section B, Line 15a</ReturnReference>
        <Explanation>TO DETERMINE THE COMPENSATION OF NYISO'S PRESIDENT AND CHIEF EXECUTIVE OFFICER, NYISO, THROUGH COLLABORATION WITH OTHER INDEPENDENT SYSTEM OPERATORS AND REGIONAL TRANSMISSION ORGANIZATIONS, ENGAGES AN INDEPENDENT EXECUTIVE COMPENSATION FIRM TO PERFORM A BENCHMARK COMPENSATION ASSESSMENT TO AID THE NYISO BOARD OF DIRECTORS IN THEIR REVIEW OF THE PRESIDENT AND CHIEF EXECUTIVE OFFICER'S COMPENSATION. AS PART OF THIS COMPENSATION ASSESSMENT, THE FORM 990 OF OTHER RELEVANT ORGANIZATIONS ( INCLUDING OTHER INDEPENDENT SYSTEM OPERATORS AND REGIONAL TRANSMISSION ORGANIZATIONS ) ARE REVIEWED. THE RESULTS OF THIS ASSESSMENT ARE PROVIDED TO THE COMMERCE AND COMPENSATION COMMITTEE OF THE NYISO BOARD OF DIRECTORS FOR REVIEW ANNUALLY. THE COMMERCE AND COMPENSATION COMMITTEE MAKES A RECOMMENDATION REGARDING THE PRESIDENT AND CHIEF EXECUTIVE OFFICER'S COMPENSATION TO THE BOARD OF DIRECTORS, AND THE BOARD OF DIRECTORS AUTHORIZES THE PRESIDENT AND CHIEF EXECUTIVE OFFICER'S COMPENSATION ANNUALLY. THE PRESIDENT AND CHIEF EXECUTIVE OFFICER HAS A WRITTEN EMPLOYMENT CONTRACT WITH CONDITIONS APPROVED BY THE BOARD OF DIRECTORS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Process used to establish compensation of other officers/key employees</Identifier>
        <ReturnReference>Form 990, Part VI, Section B, Line 15b</ReturnReference>
        <Explanation>THE NYISO ENGAGED AN INDEPENDENT EXECUTIVE COMPENSATION FIRM TO CONDUCT A BENCHMARK COMPENSATION ASSESSMENT TO AID THE NYISO BOARD OF DIRECTORS IN THEIR REVIEW OF COMPENSATION FOR ALL NYISO OFFICERS. THE COMPENSATION FIRM REVIEWS THE SCOPE OF RESPONSIBILITY FOR EACH NYISO OFFICER AND THEN DETERMINES THE COMPENSATION RATES FOR COMPARABLE POSITIONS AT OTHER INDEPENDENT SYSTEM OPERATORS AND ELECTRIC UTILITY COMPANIES OF SIMILAR SIZE. THE REPORT WAS USED TO FACILITATE A REVIEW BY THE COMMERCE AND COMPENSATION COMMITTEE AND APPROVAL BY THE NYISO BOARD OF DIRECTORS OF CURRENT COMPENSATION FOR THESE POSITIONS. THIS REVIEW IS PERFORMED ANNUALLY. SIMILARLY, KEY EMPLOYEE POSITIONS ARE BENCHMARKED BY INDEPENDENT COMPENSATION FIRMS AND/OR AGAINST SIMILAR POSITIONS IN OTHER ORGANIZATIONS AND INDUSTRIES.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Governing documents, conflict of interest policy and financial statements available to the public</Identifier>
        <ReturnReference>Form 990, Part VI, Section C, Line 19</ReturnReference>
        <Explanation>THE NYISO'S GOVERNING DOCUMENTS AND CONFLICT OF INTEREST POLICY ARE PART OF ITS FEDERALLY-APPROVED TARIFFS. THESE DOCUMENTS ARE ON FILE AT FERC AND ARE PUBLISHED ON THE NYISO'S WEBSITE. THE NYISO'S FINANCIAL STATEMENTS ARE INCLUDED IN AN ANNUAL REPORT, PUBLISHED ON THE NYISO'S WEBSITE.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="IRS990ScheduleR" softwareId="11000230" softwareVersion="v2011.1.0">
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>NEW YORK INDEPENDENT SYSTEM OPERATOR MED DENTAL &amp; LIFE</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>10 KREY BLVD</AddressLine1>
          <City>RENSSELAER</City>
          <State>NY</State>
          <ZIPCode>12144</ZIPCode>
        </AddressUS>
        <EIN>271623493</EIN>
        <PrimaryActivities>POSTRTRMT INS</PrimaryActivities>
        <LegalDomicileState>NY</LegalDomicileState>
        <ExemptCodeSection>501(C)(9)</ExemptCodeSection>
        <PublicCharityStatus>N/A</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>NYISO</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>false</ControlledOrg>
      </Form990ScheduleRPartII>
      <ReceiptOfIntAnnRentsRoyalties>false</ReceiptOfIntAnnRentsRoyalties>
      <GiftGrantOrCapContrToOtherOrg>false</GiftGrantOrCapContrToOtherOrg>
      <GiftGrantOrCapContrFrOtherOrg>false</GiftGrantOrCapContrFrOtherOrg>
      <LoansOrGuaranteesToOtherOrg>false</LoansOrGuaranteesToOtherOrg>
      <LoansOrGuaranteesFromOtherOrg>false</LoansOrGuaranteesFromOtherOrg>
      <SaleOfAssetsToOtherOrg>false</SaleOfAssetsToOtherOrg>
      <PurchaseOfAssetsFromOtherOrg>false</PurchaseOfAssetsFromOtherOrg>
      <ExchangeOfAssets>false</ExchangeOfAssets>
      <RentalOfFacilitiesToOtherOrgs>false</RentalOfFacilitiesToOtherOrgs>
      <RentalOfFacilitiesFrOtherOrgs>false</RentalOfFacilitiesFrOtherOrgs>
      <PerformOfServicesForOtherOrgs>false</PerformOfServicesForOtherOrgs>
      <PerformOfServicesByOtherOrgs>false</PerformOfServicesByOtherOrgs>
      <SharingOfFacilities>false</SharingOfFacilities>
      <SharingOfPaidEmployees>false</SharingOfPaidEmployees>
      <ReimbursementPaidToOtherOrg>false</ReimbursementPaidToOtherOrg>
      <ReimbursementPaidByOtherOrg>false</ReimbursementPaidByOtherOrg>
      <OtherTransferToOtherOrg>false</OtherTransferToOtherOrg>
      <OtherTransferFromOtherOrg>false</OtherTransferFromOtherOrg>
    </IRS990ScheduleR>
  </ReturnData>
</Return>