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        <ExplanationTxt>THE CALIFORNIA INDEPENDENT SYSTEM OPERATOR CORPORATION ("CAL ISO") WAS CREATED PURSUANT TO SPECIFIC LEGISLATION (ASSEMBLY BILL 1890 - CHAPTER 854, CALIFORNIA STATUTES OF 1996) IN WHICH THE STATE OF CALIFORNIA ASSUMED A SUBSTANTIALLY INCREASED ROLE IN PROMOTING COMPETITION IN THE SUPPLY OF ELECTRICITY IN CALIFORNIA IN ORDER TO ACCOMPLISH A MEANINGFUL IMMEDIATE REDUCTION IN THE OVERALL PRICE OF ELECTRIC SERVICE TO THE GENERAL PUBLIC THROUGHOUT CALIFORNIA. THE BOARD OF CAL ISO IS COMPOSED OF MEMBERS APPOINTED BY THE CALIFORNIA GOVERNOR AND CONFIRMED BY THE CALIFORNIA STATE SENATE.</ExplanationTxt>
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        <FormAndLineReferenceDesc>PART I, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>IN 2023, THE INDIVIDUALS LISTED BELOW PARTICIPATED IN A SUPPLEMENTAL NON-QUALIFIED RETIREMENT PLAN. CALIFORNIA ISO CONTRIBUTED THE FOLLOWING AMOUNTS TO THE PLAN WHICH ARE INCLUDED IN THE DEFERRED COMPENSATION REPORTED ON SCHEDULE J, PART II: -ELLIOTT MAINZER - PRESIDENT &amp; CEO $0 -MARK ROTHLEDER - SR VP &amp; CHIEF OPERATING OFFICER $107,194 -ROGER COLLANTON - VP, GEN CNSL &amp; CHIEF COMPLIANCE OFFICER $49,503 -RYAN SEGHESIO - VP, CHIEF FINANCIAL OFFICER &amp; TREASURER $41,591 -NEIL MILLAR - VP, INSTRASTRUSTURE &amp; OPERATIONS PLANNING $43,926 -STACEY CROWLEY - VP, EXTERNAL AFFAIRS $33,855 -JODI ZIEMATHIS - VP, HUMAN RESOURCES $38,365 -ANNA MCKENNA - VP, MARKET POLICY &amp; PERFORMANCE $39,292 -KHALED ABDUL-RAHMAN - VP, PWR SYSTEMS &amp; MARKET TECH $31,851 -DEDE SUBAKTI - VP, SYSTEMS OPERATIONS $26,010 -JOANNE SERINA - VP, STAKEHOLDER ENGAGEMENT $19,395</ExplanationTxt>
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        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION USES A NON-FIXED PAYMENT METHOD BASED ON A SCORE-BASED SYSTEM FOR INCENTIVE COMPENSATION. THIS SYSTEM IS EVALUATED AND DETERMINED BY THE BOARD ON AN ANNUAL BASIS.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF CALIFORNIA ISO IS COMPOSED OF MEMBERS APPOINTED BY THE CALIFORNIA GOVERNOR AND CONFIRMED BY THE CALIFORNIA STATE SENATE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS REVIEWED BY THE VP, GENERAL COUNSEL AND CHIEF COMPLIANCE OFFICER, VP, CHIEF FINANCIAL OFFICER, CONTROLLER, ASSISTANT CONTROLLER, DIRECTOR OF COMMUNICATIONS, LEAD COUNSEL - CORPORATE, VP, HR. THE FORM 990 IS PROVIDED TO THE BOARD OF GOVERNORS PRIOR TO FILING.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUALLY, EMPLOYEES ARE REQUIRED TO ATTEND THE ALL EMPLOYEE TRAINING WHICH INCLUDES: CODE OF CONDUCT, SECURITY AWARENESS, EMPLOYEE RELATIONS SAFETY AND HARASSMENT PREVENTION. EMPLOYEES ARE REQUIRED ANNUALLY TO SIGN A FORM TO DISCLOSE IF ANY POTENTIAL CONFLICT OF INTEREST EXISTS THAT MAY AFFECT THE EMPLOYEE'S ABILITY TO PERFORM HIS/HER JOB. LEAD COUNSEL - CORPORATE REVIEWS ALL DISCLOSURES TO ENSURE THAT ANY ACTUAL OR POTENTIAL CONFLICTS ARE MITIGATED. THIS PROCESS IS REVIEWED ANNUALLY BY OUR INTERNAL AUDIT FUNCTION (AUDIT AND ADVISORY SERVICES).</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>SINCE 1998, THE BOARD OF GOVERNORS OF THE ISO HAS WORKED CLOSELY WITH NATIONALLY RECOGNIZED HUMAN RESOURCES AND EXECUTIVE COMPENSATION ADVISORY FIRMS TO DEVELOP AN APPROPRIATE COMPENSATION PROGRAM FOR THE EXECUTIVES OF THE ISO. COMPETITIVE COMPENSATION FOR ALL NON-OFFICER EMPLOYEES IS ALSO ESTABLISHED BY ANNUAL THIRD-PARTY COMPENSATION SURVEYS. THESE FIRMS HELPED THE BOARD OF GOVERNORS DETERMINE THE APPROPRIATE LEVELS OF EXECUTIVE COMPENSATION BY COMPILING EXTENSIVE MARKET DATA CONCERNING EXECUTIVE COMPENSATION FOR POSITIONS SIMILAR TO EXECUTIVE POSITIONS AT THE ISO. THESE FIRMS HISTORICALLY HAVE MET WITH THE BOARD OF GOVERNORS AT LEAST ANNUALLY TO PRESENT EXECUTIVE COMPENSATION MARKET DATA, MAKE RECOMMENDATIONS AND OTHERWISE DISCUSS EXECUTIVE COMPENSATION ISSUES. THE BOARD RELIED ON THE COMPARABILITY DATA TO DETERMINE THE APPROPRIATE COMPENSATION, APPROVED THE COMPENSATION, AND DOCUMENTED THE APPROVAL IN ITS MINUTES.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES AVAILABLE ON ITS WEBSITE (ACCESSIBLE BY THE PUBLIC) THE FINANCIAL STATEMENTS, THE CODE OF CONDUCT POLICY, THE TARIFF (RULES OF THE ISO MARKET), THE ARTICLES OF INCORPORATION (AND ALL AMENDMENTS), THE CORPORATE BY-LAWS AND THE MINUTES OF THE BOARD OF GOVERNORS' MEETINGS (EXCEPT FOR THE EXECUTIVE SESSIONS). THE DOCUMENTS ARE ALSO AVAILABLE UPON REQUEST.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>CONSULTANTS: PROGRAM SERVICE EXPENSES 6,791,630. MANAGEMENT AND GENERAL EXPENSES 1,676,951. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 8,468,581. RECRUITMENT/STAFFING: PROGRAM SERVICE EXPENSES 6,714,708. MANAGEMENT AND GENERAL EXPENSES 2,196,164. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 8,910,872. GIP/OTHER: PROGRAM SERVICE EXPENSES 20,826,738. MANAGEMENT AND GENERAL EXPENSES 1,044,137. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 21,870,875.</ExplanationTxt>
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