IRPC Annual Report 2023

Message from the Corporate Governance and Sustainability Committee Dear Shareholders, The Corporate Governance and Sustainability Committee is resolute in steering IRPC Public Company Limited towards competitiveness. This commitment is anchored in upholding good corporate governance principles and a robust code of business conduct to foster transparency, accountability, and a steadfast rejection of corruption in all its forms. Furthermore, we underscore the company’s consistent alignment with Sustainable Development Goals (SDGs) and embrace of the environmental, social, and governance (ESG) framework. These initiatives inspire confidence among all stakeholders, who expect equal treatment and a commitment to fairness. In 2023, the Corporate Governance and Sustainability Committee consisted of three directors: (1) Mr. Supot Laosuarpha, Chairman of the Corporate Governance and Sustainability Committee (deceased December 26, 2023); (2) Mr. Chaiyaporn Phuprasert, Independent Director; and (3) Mrs. Pranot Tirasai, Director. The Committee convened a total of five meetings, achieving full attendance, to provide oversight promoting corporate governance and sustainability practices among the management and employees. We also monitored governance and sustainability performance and outcomes, and reported to the Board of Directors on a quarterly basis as part of continuing efforts to develop and achieve corporate governance practices on par with internationally accepted standards. The Corporate Governance and Sustainability Committee’s performance can be summarized as follows: 1. Development and promotion of corporate governance The Corporate Governance and Sustainability Committee provided oversight and monitored corporate governance practices of IRPC and its subsidiaries to ensure full regulatory compliance in accordance with domestic as well as international standards by undertaking the following measures: • To improve the Committee effectiveness through reorganizing and incorporating sustainability oversight role and responsibilities into the Corporate Governance and Sustainability Committee. • To improve performance evaluation forms for the Board of Directors and its subcommittees as well as reviewing the performance of the Corporate Governance and Sustainability Committee’s own performance in the past year so as to improve its effectiveness to produce concrete results. • To ensure continuing director development with respect to corporate governance practices by encouraging them to enroll in training courses of the Thai Institute of Directors Association (IOD) or to attend workshops given by experts in various fields to enable them to perform their duties more effectively in guiding the way the company conducts its businesses. • To approve the Corporate Governance Plan and Corporate Compliance Plan along with continuous monitoring to ensure they are strictly followed. • To review the Corporate Governance Handbook and code of business conduct as well as the Corporate Governance Policy to raise the standard of the company’s corporate governance practices on par with domestic and international best practices. • To support Governance, Risk Management & Internal Control, and Compliance (GRC) to develop a holistic approach in improving and rationalizing the work processes. • To cul t ivate corporate cul ture and corporate governance awareness among the management, employees and all stakeholders, internal as well as external, through implementation of projects and activities promoting code of ethical conduct, such as PTT Group CG Day 2023, IRPC CG Day 2023, and IRPC Cubic Academy Season 8, etc. • To promote and encourage suppliers to join the declaration of intent to combat corruption under the Thai Private Sector Collective Action Against Corruption (CAC). For this, IRPC received the CAC Change Agent Award 2023. 56 IRPC Public Company Limited Message from the Corporate Governance and Sustainability Committee

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