(d) ensuring the general well-being and administration of the Public Service and its maintenance in a high state of efficiency; and (e) making regulations for any of the purposes set out in this section. 184 Permanent Secretaries The Chief Secretary to the President and Cabinet, and Permanent Secretaries of Ministries, must be appointed by the President on the advice of the Public Service Commission. 185 Ambassadors and other principal representatives of Zimbabwe abroad (1) The President may appoint persons to hold the office of ambassador or other principal representative of Zimbabwe in other countries or accredited to international organisations. (2) The President may at any time remove a person from the post of ambassador or principal representative of Zimbabwe. (3) Before appointing or removing a person as ambassador or principal representative of Zimbabwe, the President must consult the Public Service Commission. CHAPTER X DEFENCE FORCES 186 Defence Forces The Defence Forces of Zimbabwe consist of an army, an air force and any other services that may be established under an Act of Parliament. 187 Primary function of Defence Forces The primary function of the Defence Forces is to defend and protect Zimbabwe, its people, its Constitution, its national security and interests and its territorial integrity. 188 Deployment of Defence Forces (1) With the authority of the President, the Defence Forces may be deployed in Zimbabwe– (a) in defence of Zimbabwe; (b) in support of the Police Service in the maintenance of public order; or (c) in support of the Police Service and other civilian authorities in the event of an emergency or disaster. (2) With the authority of the President, the Defence Forces may be deployed outside Zimbabwe– (a) on peace-keeping operations under the auspices of the United Nations Organisation, African Union, Southern African Development Community or any other international or regional organisation; (b) to defend the territorial integrity of a foreign country; (c) in fulfilment of an international commitment; or (d) in defence of Zimbabwe's national security or national interests. (3) A deployment of the Defence Forces outside Zimbabwe, otherwise than in peacekeeping operations or in fulfilment of multilateral international commitments, must be rescinded unless - 71 -