Enemy medical personnel and medical staff administrators who are engaged in either the search for, collection, transport, or treatment of the wounded or sick, or the prevention of disease; chaplains attached to enemy armed forces; and, staff of National Red Cross Societies and that of other volunteer aid societies, duly recognized and authorized by their governments to assist medical service personnel of their own armed forces, provided they are exclusively engaged in the search for, or the collection, transport or treatment of wounded or sick, or in the prevention of disease, and provided that the staff of such societies are subject to military laws and regulations.