(e) enhancement of economic cooperation among countries of the South, (f) non-interference in the affairs of other States, promotion of good-neighbourliness and mutual cooperation with all neighbours and maintaining amicable and balanced relations with other countries, (g) combating international and trans-national organized crime and terrorism. Defence of the Country 18 Defence of the Country is an honour and a duty of every citizen; the State shall care for the combatants, the afflicted in war, the families of martyrs and those missing in action. Public Health 19 The State shall promote public health and guarantee equal access and free primary health care to all citizens. Fiscal Levies 20 (1) No taxes, fees, tariffs or other fiscal dues, shall be levied save by law. (2) Zakat is a duty on Muslims; its collection, expenditure and administration shall be regulated in the Northern states by law. National Reconciliation 21 The State shall initiate a comprehensive process of national reconciliation and healing that shall promote national harmony and peaceful co-existence among all Sudanese. Saving 22 Unless this Constitution otherwise provides, or a duly enacted law guarantees the rights and liberties described in this Chapter, the provisions contained in this Chapter are not by themselves enforceable in a court of law; however, the principles expressed herein are basic to governance and the State is duty-bound to be guided by them, especially in making policies and laws. 9