12 (a) a public officer of another Ministry; or (b) an employee of a statutory body under the charge of another Minister, 5 where that other Ministry or statutory body has supervisory or regulatory responsibility over an industry or a sector to which the owner of the critical information infrastructure belongs. (3) The Commissioner may in writing appoint such number of public officers as cybersecurity officers as the Commissioner thinks necessary for carrying this Act into effect. 10 (4) Subject to any general or special directions of the Minister, the Commissioner is responsible for the administration of this Act, and has and may perform such duties and functions as are imposed, and exercise such powers as are conferred, upon the Commissioner by this Act. 15 (5) The Deputy Commissioner has and may exercise all the powers, duties and functions of the Commissioner except those exercisable under section 7 or 9. 20 25 (6) Subject to such conditions or limitations as the Commissioner may specify, an Assistant Commissioner or a cybersecurity officer has and may exercise all the powers, duties and functions of the Commissioner as may be delegated to that Assistant Commissioner or cybersecurity officer in writing, except — (a) in the case of an Assistant Commissioner, those powers, duties or functions exercisable under this subsection, or section 6, 7, 9 or 20(5); and (b) in the case of a cybersecurity officer, those powers, duties or functions exercisable under this subsection, or section 6, 7, 9, 11, 12 or 20(5). Duties and functions of Commissioner 30 5. The Commissioner has the following duties and functions: (a) to oversee and promote the cybersecurity of computers and computer systems in Singapore;