IRPC One Report EN

Assessment Topic Assessment Score 2020 Assessment Score 2021 1. Independence in the performance of duties 100% 100% 2. Review of financial statements 100% 100% 3. Consideration of connected transactions 100% 100% 4. Review of the internal control system 75.00% 100% 5. Reviewing to ensure the company implement risk assessment 100% 100% 6. Review to ensure compliance with the rules of the SEC and SET. 100% 100% 7. Other operations as assigned 75.00% 100% 8. Regular reporting of performance to the Board 100% 100% Total score 93.75% 100% 4.4) Audit Committee 4.4.1) Assessment of the Audit Committee by the Chairman Assessment Topic Assessment Score 2020 Assessment Score 2021 1. Structure and composition of the Audit Committee 96.67% 100% 2. Roles and Responsibilities 100% 100% 3. Relationship with Internal Auditors and Auditors 100% 100% 4. Relationship with Management 100% 100% 5. Reporting 100% 100% 6. Quality Control 95.83% 100% Total score 98.75% 100% 4.4.2) Assessment of the performance of the whole Audit Committee 258 IRPC PUBLIC COMPANY LIMITED 56-1 ONE REPORT 2021

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