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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 - ORGANIZATION'S MISSION</FormAndLineReferenceDesc>
        <ExplanationTxt>NESCOE'S MISSION IS TO REPRESENT THE INTERESTS OF THE CITIZENS OF THE NEW ENGLAND REGION BY ADVANCING POLICIES THAT WILL PROVIDE ELECTRICITY AT THE LOWEST POSSIBLE PRICE OVER THE LONG TERM, CONSISTENT WITH MAINTAINING RELIABLE SERVICE AND ENVIRONMENTAL QUALITY. THROUGH COLLABORATION WITH STAKEHOLDERS AND PRESENTATION OF NESCOE'S VIEWS, IT ADVANCES POLICIES WHICH SEEK TO FACILITATE THE EFFICIENT DEVELOPMENT POWER GENERATION, DEMAND MANAGEMENT AND TRANSMISSION RESOURCES TO RELIABLY SERVE N.E. CUSTOMERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 2, PART III, LINE 4A</FormAndLineReferenceDesc>
        <ExplanationTxt>THROUGHOUT 2025, NESCOE REPRESENTED THE COLLECTIVE VIEWS OF THE NEW ENGLAND STATES, AND REGULARLY PLAYED AN IMPORTANT ROLE IN SUBSTANTIVE NEW ENGLAND REGIONAL STAKEHOLDER FORUMS, AND BEFORE THE FEDERAL ENERGY REGULATORY COMMISSION, CONCERNING RESOURCE ADEQUACY AND SYSTEM PLANNING-RELATED ISSUES WITH SIGNIFICANT IMPLICATIONS FOR NEW ENGLAND CONSUMERS. THIS INCLUDED NESCOE'S REGULAR PARTICIPATION IN NEW ENGLAND POWER POOL'S PARTICIPANTS, RELIABILITY, TRANSMISSION, AND MARKETS COMMITTEE MEETINGS. NESCOE ALSO OFFERED PROPOSALS IN CONNECTION WITH PLANNING AND MARKET RULE CHANGES TO ADVANCE CONSUMER INTERESTS AND STATES' SHARED ENERGY OBJECTIVES. ADDITIONALLY, NESCOE PARTICIPATED IN ISO NEW ENGLAND'S PLANNING ADVISORY COMMITTEE AND POWER SUPPLY PLANNING COMMITTEE. NESCOE ALSO MONITORED VARIOUS WORKING GROUPS. THROUGHOUT 2025, NESCOE SPENT CONSIDERABLE TIME WORKING TO IMPROVE THE TRANSPARENCY AROUND AND OVERSIGHT OF ASSET CONDITION SPENDING, INCLUDING BUT NOT LIMITED TO WORK ON THE DEVELOPMENT OF A NEW ASSET CONDITION REVIEWER FUNCTION WITHINT ISO-NEW ENGLAND. CONCURRENTLY, NESCOE ACTIVELY ENGAGED IN THE EVALUATION OF PROPOSED ASSET CONDITION PROJECTS PRESENTED TO THE PLANNING ADVISORY COMMITTEE. NESCOE CONTINUED ITS APPEAL OF FERC ORDER 1920 REGARDING REGIONAL TRANSMISSION PLANNING AND COST ALLOCATION, FOCUSED ON THE TRANSPARENCY OF ASSET CONDITION PROJECT SPENDING. NESCOE NEGOTIATED COST MANAGEMENT, CONTAINMENT, AND TRANSPARENCY COMMITMENTS FROM TWO TRANSMISSION OWNERS OF THE U.S. DEPARTMENT OF ENERGY- SUPPORTED POWER UP NEW ENGLAND INFRASTRUCTURE PROJECT. IN RELATION TO LONGER-TERM REGIONAL TRANSMISSION PLANNING, NESCOE WORKED ON ADVANCING THE REGION'S FIRST LONGER-TERM TRANSMISSION PLANNING SOLICITATION, ISSUED BY ISO-NEW ENGLAND IN MARCH 2025 TO STRENTHEN NORTH- SOUTH NEW ENGLAND INTERCONNECTION. IN 2025, TO PROMOTE ADDITIONAL TRANSPARENCY IN ELECTRICITY RATES AND TO PROTECT CONSUMERS, NESCOE CONDUCTED AN INVESTIGATION INTO THE TRANSMISSION OWNERS' REGIONAL NETWORK SERVICE RATE ANNUAL UPDATE FILING. FOLLOWING ITS INVESTIGATION, NESCOE MADE INFORMAL CHALLENGES UNDER THE REGION'S FORMULA PROTOCOLS, MANY OF WHICH RESULTED IN SAVINGS TO CONSUMERS. IN CONNECTION WITH WHOLESALE MARKET REFORMS, THROUGHOUT 2025, NESCOE ACTIVELY PARTICIPATED IN THE DEVELOPMENT OF CAPACITY AUCTION REFORM PROVISIONS (CAR-PD), WHICH REACHED NEAR UNANIMOUS REGIONAL STAKEHOLDER SUPPORT AND WERE FILED WITH FERC IN LATE 2025; MONITORED THE 2025 IMPLEMENTATION OF DAY-AHEAD ANCILLARY SERVICES MARKET DESIGN; ENGAGED ON THE DEVELOPMENT OF SEASONAL CAPACITY MARKET AND RESOURCE ACCREDITATION REFORMS (CAR-SA); AND FILED COMMENTS AT FERC SUPPORTING RESOURCE PERFORMANCE PROTECTIONS FOLLOWING A RECORD HEATWAVE SCARCITY EVENT. IN CONNECTION WITH EMERGING LARGE LOAD ISSUES, IN 2025, NESCOE FILED COMMENTS WITH FERC IN A NEWLY OPENED RULEMAKING CONCERNING THE INTERCONNECTION OF LARGE ELECTRIC LOADS (INCLUDING DATA CENTERS), ASSERTING THAT THE ACCELERATED TIMELINE WOULD PRECLUDE MEANINGFUL STATE AND STAKEHOLDER PARTICIPATION AND WOULD ENCROACH ON STATES' EXCLUSIVE JURISDICTION OVER RETAIL ELECTRIC SERVICE UNDER THE FEDERAL POWER ACT. NESCOE ALSO COMMENCED REGIONAL STATE DISCUSSIONS ABOUT LARGE LOAD CHALLENGES AND OPPORTUNITIES AND CONSUMER IMPLICATIONS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MANAGERS OF NESCOE, REPRESENTING EACH OF THE SIX NEW ENGLAND STATES, ARE EACH APPOINTED BY THEIR RESPECTIVE STATE GOVERNOR.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>SHANNON BEALE 19 WINSLOW ROAD NATICK, MA 01760 JEFFREY BENTZ 161 PLEASANT VIEW DRIVE SUFFIELD, CT 06078 SHEILA KEANE 1 MACKENZIE COURT ANDOVER, MA 01810 NATHAN FORSTER 9 RUBLEE STREET ARLINGTON, MA 02476</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL MANAGERS ARE PROVIDED A DRAFT COPY OF FORM 990 FOR REVIEW AND COMMENT. UPON APPROVAL OR WITHOUT OBJECTION, THE RETURN IS ACCEPTED AS PREPARED AND FILED.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>EXECUTIVE DIRECTOR MONITORS FOR ANY CONFLICT OF INTERESTS. EXECUTIVE DIRECTOR REVIEWS AND APPROVES ALL EXPENDITURES, WITH NO ISSUES THAT WOULD GIVE RISE TO ANY INQUIRY OF POTENTIAL CONFLICT IN CONNECTION WITH MANAGERS OR KEY EMPLOYEES. NO DISCLOSURES WERE MADE BY MANAGERS OR KEY EMPLOYEES THAT REQUIRED SCRUTINY RELATIVE TO NESCOE FUNDS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>NESCOE HAS ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC, UPON REQUEST.</ExplanationTxt>
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</Return>