80 (2) Each ministry is to be under the administration of a permanent secretary, and any department of Government that is not part of any ministry shall be under the administration of the permanent secretary responsible for the Office of the Prime Minister. (3) The permanent secretary of a ministry is responsible to the Minister concerned for the efficient, effective and economical management of the ministry or any department under the ministry. (4) The Public Service Commission, with the agreement of the Prime Minister, may at any time re-assign one or more permanent secretaries amongst the various ministries of the State. (5) A permanent secretary may resign from office by giving written notice to the Public Service Commission. (6) A permanent secretary shall be entitled to such remuneration as determined by the Public Service Commission following the agreement of the Prime Minister, and any such remuneration must not be varied to their disadvantage, except as part of an overall austerity reduction similarly applicable to all officers of the State. (7) The permanent secretary of each ministry shall have the authority to appoint, remove and institute disciplinary action against all staff of the ministry, with the agreement of the Minister responsible for the ministry. (8) The permanent secretary of each ministry, with the agreement of the Minister responsible for the ministry, has the authority to determine all matters pertaining to the employment of all staff in the ministry, including— (a) the terms and conditions of employment; (b) the qualification requirements for appointment and the process to be followed for appointment, which must be an open, transparent and competitive selection process based on merit; (c) the salaries, benefits and allowances payable, in accordance with its budget as approved by Parliament; and (d) the total establishment or the total number of staff that are required to be appointed, in accordance with the budget as approved by Parliament. Appointment of ambassadors 128.—(1) The Prime Minister may, on the advice of the Minister responsible for foreign affairs, make appointments to offices of ambassador, or of other principal representative, of the State to another country or an international organisation. (2) The Prime Minister may, on the advice of the Minister responsible for foreign affairs, remove a person from an office referred to in subsection (1).