100 (3) Members of the security services must not be active members or office-bearers of any political party or organisation. (4) Serving members of the security services must not be employed or engaged in civilian institutions except in periods of public emergency. 11.4 National Security Council (1) There is a National Security Council consisting of the President as chairperson, the Vice-Presidents and such Ministers and members of the security services and other persons as may be determined in an Act of Parliament. (2) The functions of the National Security Council are— (a) to develop the national security policy for Zimbabwe; (b) to inform and advise the President on matters relating to national security; and (c) any other functions that may be prescribed in an Act of Parliament. (3) The commanders of the security services must provide the National Security Council with such reports on the security situation in Zimbabwe as the Council may reasonably require. 11.5 Independent complaints mechanism An Act of Parliament must provide an effective and independent mechanism for receiving and investigating complaints from members of the public about misconduct on the part of members of the security services, and for remedying any harm caused by such misconduct. PART 2 DEFENCE FORCES 11.6 Defence Forces (1) 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. (2) The Defence Forces are the only lawful military forces in Zimbabwe. (3) The Defence Forces must be non-partisan, national in character, patriotic, professional and subordinate to the civilian authority as established by this Constitution. (4) The Defence Forces must be maintained as disciplined military forces. (5) An Act of Parliament must provide for the organisation, structure, management, regulation, discipline and, subject to section 11.13, the conditions of service of members of the Defence Forces. 11.7 Function of Defence Forces The function of the Defence Forces is to protect Zimbabwe, its people, its national security and interests and its territorial integrity and to uphold this Constitution.