(a) those customs and practices prejudicial to the health or life of the child; and (b) those customs and practices discriminatory to the child on the grounds of sex or other status. 2. Child marriage and the betrothal of girls and boys shall be prohibited and effective action, including legislation, shall be taken to specify the minimum age of marriage to be 18 years and make registration of all marriages in an official registry compulsory. ARTICLE 22: ARMED CONFLICTS 1. States Parties to this Charter shall undertake to respect and ensure respect for rules of international humanitarian law applicable in armed conflicts which affect the child. 2. States Parties to the present Charter shall take all necessary measures to ensure that no child shall take a direct part in hostilities and refrain in particular, from recruiting any child. 3. States Parties to the present Charter shall, in accordance with their obligations under international humanitarian law, protect the civilian population in armed conflicts and shall take all feasible measures to ensure the protection and care of children who are affected by armed conflicts. Such rules shall also apply to children in situations of internal armed conflicts, tension and strife. ARTICLE 23: REFUGEE CHILDREN 1. States Parties to the present Charter shall take all appropriate measures to ensure that a child who is seeking refugee status or who is considered a refugee in accordance with applicable international or domestic law shall, whether unaccompanied or accompanied by parents, legal guardians or close relatives, receive appropriate protection and humanitarian assistance in the enjoyment of the rights set out in this Charter and other international human rights and humanitarian instruments to which the States are Parties. 2. States Parties shall undertake to cooperate with existing international organizations which protect and assist refugees in their efforts to protect and assist such a child and to trace the parents or other close relatives or an unaccompanied refugee child in order to obtain information necessary for reunification with the family.