PTT Oil and Retail Business Public Company Limited at the Board of Directors meeting held on October 27, 2021, resolved to appoint company's sub-committee's members as: Ms. Dujduan Hetrakul as Member of the Nomination and Remuneration Committee; Mr. Supat Metheeworapote as Member of the Nomination and Remuneration Committee; Mr. Disathat Panyarachun as Member of the Corporate Governance Committee; and Dr. Buranin Rattanasombat as Member of the Enterprise Risk Management Committee. The appointments are effective from October 27, 2021.