Constitution of Zambia (Amendment) [No. 2 of 2016 81 (b) adequately and properly equipped to enable them effectively perform their functions. 192. (1) There is established the Defence Force of Zambia consisting of— (a) the Zambia Army; Establishment of Defence Force and functions (b) the Zambia Air Force; (c) the Zambia National Service, as an auxiliary unit; and (d) other units, as prescribed. (2) The Defence Force shall— (a) preserve and defend the sovereignty and territorial integrity of the Republic; (b) foster harmony and understanding between the Zambia Army, Zambia Air Force, an auxiliary unit and members of society; and (c) co-operate with State organs and State institutions in times of public emergencies and national disasters. 193. (1) There are established the following national security services— (a) the Zambia Police Service; (b) the Zambia Security Intelligence Service; (c) the Zambia Correctional Service; and (d) any other national security service, as prescribed. (2) The Zambia Police Service shall— (a) protect life and property; (b) preserve peace and maintain law and order; (c) ensure the security of the people; (d) detect and prevent crime; (e) uphold the Bill of Rights; (f) foster and promote good relationships with the Defence Force, other national security services and members of society; and (g) perform other functions as prescribed. Establishment of national security services and functions