GC_ONE REPORT 2021_ENG

7. Appointment of auditors The Audit Committee has selected and proposed the appointment of the auditors based on the qualifications, namely knowledge, experience in business auditing, audit approach, performance, and independence of the auditor in accordance with the professional ethics in auditing as required by the Federation of Accounting Professions and according to the regulations of the Securities and Exchange Commission, and appropriate audit fees. The Audit Committee will propose the appointment of the auditor to the Board of Directors for consideration and approval which shall be presented in the General Meeting of shareholders. In 2021, the shareholders approved the appointment of Deloitte Touche Tohmatsu Jaiyos Audit Company Limited as the Company’s auditor for the year 2021. 8. Consideration of connected transactions or transactions that may lead to conflicts of interest, in accordance with the laws and regulations of the Stock Exchange of Thailand The Audit Committee has reviewed and remarked on connected transactions or transactions that have or may have conflicts of interest with the Company, based on the principles of justifiability, transparency, adequate disclosure of information, and in the best interest of the Company and the shareholders and also oversaw that the disclosure of information was completed, accurate and adequate in accordance with the stipulations of the Stock Exchange of Thailand. In 2021, there were no significant connected transactions or transactions that deviate from the contract conditions that required disclosure of information according to the regulations of the Stock Exchange of Thailand. The review of the internal audit report on connected transactions reported that no significant issues were found to affect the achievement of the organizational objectives. Moreover, the Audit Committee did not receive reports on irregularities from the auditor on connected transactions. 9. Other matters The Audit Committee performed the annual review of the Audit Committee Charter for alignment with the principles and guidelines specified by the Securities and Exchange Commission and reported its performance to the Board of Directors periodically. Furthermore, the Audit Committee completed individual and collective performance assessments and reported the results to the Board of Directors for acknowledgment, as a further enhancement of the performance of the Audit Committee. The Audit Committee has thoroughly fulfilled their duties and responsibilities as stated in the Audit Committee Charter and as prescribed to them by the Board of Directors whilst adhering to the principles of righteousness, thoroughness, independence, all the while being mindful of equitable treatment to all stakeholders. The Audit Committee is thus of the opinion that the Company has an accurate and reliable accounting and financial reporting system, adequate information disclosure, compliance with Generally Accepted Accounting Principles and Financial Reporting Standards, compliance with laws and regulations related to the Company’s business operations, with good corporate governance, adequate risk management and appropriate internal controls for business operations, a good internal audit system, diligent monitoring of the various changes in preparation for the confrontation of all current and future risks. Lastly, in performing the duties of the Audit Committee throughout 2021, excellent collaboration from the Board of Directors, Executives, auditors and all concerned parties were received. The Audit Committee would like to take this opportunity to express thanks and appreciation to all. On behalf of the Audit Committee (Signed) Apisak Tantivorawong (Mr. Apisak Tantivorawong) Chairman of the Audit Committee 190 PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED Form 56-1 One Report 2021

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