Certification Audit or Financial Statement Audit is one of the major audit works of the Office of the Auditor General of Thailand (Thai OAG). As specified by section 39 of the Organic Act on State Audit, B.E. 2542 (1999), the Thai OAG is responsible for auditing receipt and payment, the custody and disbursement of money and other properties belonging to or being within the responsibility of the audited agency and give opinions as to whether it is in compliance with the laws, rules, regulations or resolutions of the Council of Ministers. In the case where an audited agency is an audited agency under section 4(4) or (5) of the Act which is a state enterprise under the law on budgetary procedure or under other laws and other state agency, respectively, opinions shall be given in accordance with the Generally Accepted Auditing Standards (GAAS).