IRPC Annual Report 2023

1. Performance evaluation form for the entire Board of Directors 2. Self-assessment of work performance 3. Performance evaluation form of other directors (crossevaluation, 2 persons) 4. Subcommittee performance evaluation form 5. Evaluation form for the committee chargedwith supervising anti-corruption measures 6. Evaluation form for the effectiveness of the preparation for Board meetings (Company Secretary Assessment) Results and recommendations based on such assessment were presented to the Board of Directors as input for determining ways to improve the Board effectiveness, and the overall assessment results were disclosed in Form 56-1, One Report, under the Assessment of the Performance of the Board of Directors section Page 254-257. 8. Operational Oversight of IRPC and Subsidiaries in the IRPC Group Board of Directors has established the IRPC Group’s governance policy and management approach. The IRPC Group Way of Conduct handbook was created to provide a framework of guidelines, practices and operational processes covering all aspects of the operations of the company and its subsidiaries to ensure consistency and unity of purpose in supervising subsidiaries to implement and achieve common standards across the IRPC Group. Details as shown in the Report under Operational Oversight of IRPC and Subsidiaries in the IRPC Group section Page 262-267. 9. Outside Interests Policy The Board of Directors approved the criteria on outside interests, which apply to the President, CEO, and employees of the company. This is to ensure there are clear guidelines in compliance with good corporate governance principles and conformity to IRPC’s nature of business and good practices of its majority shareholders. The rules are as follows: 1) In the event that the President and CEO has been assigned a position external to the company’s affairs by royal command or lawful order of the Cabinet, the appointee shall inform the Board to acknowledge as soon as such command or order was received, as the case may be. 2) In the event that the president and CEO have been requested to serve as a director, committee member, specialist, expert, consultant, or any other position external to the company’s affairs by a government agency, state enterprise, public agency, independent organization, or publicly funded education institutions, the President and CEO shall seek prior approval from the Board. 3) In the event that the President and CEO, or executive officer from the executive vice president level up, has been requested to serve as a director, member of committee, workgroup, specialist, expert, consultant, or any other position at a company or juristic entity external to the company’s affairs, other than the provision under Rule 2, such person shall seek prior approval from the Board. For executive and employee from the departmental manager level down, prior permission must be obtained from the President. 4) For all executive officers and employees whose outside interests fall under the provision of Rules 1 or 2, they must inform or seek permission from the President and CEO before accepting the offer, as the case may be. 5) The appointment of a director to serve in a subsidiary or joint venture, according to the shareholding ratio or agreement made between shareholders, shall be at the discretion of the Board of Directors. 199 Corporate Governance Policy 56-1 ONE REPORT 2023

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