104 (3) A person who has served as Commissioner-General of Police may not be appointed to the command of any other security service. (4) The Commissioner-General of Police must exercise his or her command in accordance with any general written policy directives given by the Minister responsible for the police. 11.17 Establishment and composition of Police Service Commission (1) There is a Police Service Commission consisting of a chairperson, who must be the chairperson of the Civil Service Commission, and a minimum of two and a maximum of six other members appointed by the President. (2) Members of the Police Service Commission must be chosen for their knowledge or experience in the maintenance of law and order, administration, or their professional qualifications or their general suitability for appointment, and (a) at least half the members must be persons who are not and have not been members of the Police Service; (b) at least one of them must have held a senior rank in the Police Service for one or more periods amounting to at least five years. 11.18 Functions of Police Service Commission (1) The Police Service Commission has the following functions— (a) to appoint qualified and competent persons to hold posts or ranks in the Police Service; (b) to fix and regulate conditions of service, including salaries, allowances and other benefits, of members of the Police Service; (c) to ensure the general well-being and administration of the Police Service and its maintenance in a high state of efficiency; (d) to ensure that members of the Police Service comply with section 11.3; (e) to foster harmony and understanding between the Police Service and civilians; (f) to advise the President and the Minister on any matter relating to the Police Service; and (g) to exercise any other function conferred or imposed on the Commission by this Constitution or an Act of Parliament. (2) The Police Service Commission, with the approval of the Minister responsible for the Police Service, may make regulations for any of the purposes set out in subsection (1). (3) In fixing the salaries, allowances and other benefits of members of the Police Service, the Police Service Commission must act with the approval of the President given on the recommendation of the Minister responsible for finance and after consultation with the Minister responsible for the Police Service.