Article 1028
The trustee who is to be appointed for the administration of the estate of a continuously absent person whose whereabouts are unknown must pay off the property of the continuously absent person the cost of living (nafaqeh) of the permanent wife or the temporary wife of the continuously absent person duration of marriage has not yet expired and to whom the continuously absent person has undertaken to pay the cost of living. He should also pay out of the property of the continuously absent person the cost living of his children. If any difference arises as to the fixing of the amount of cost of living, the court must determine the amount.