Art. 12. The inhabitants of a safety zone shall consist of persons who form part of the non-combatant civil population of the State concerned, and shall comprise only the following classes of persons:
(a) persons over the age of 60 years,
(b) persons under the age of 15 years,
(c) persons between 15 and 60 years of age who, by reason of physical or mental infirmity, or by reason of their being expectant mothers or mothers who are suckling infants, are unfit or unable to take part in any work that would enable the State concerned to carry on the war. The question whether any person is or is not within this category is one for the decision of the Controlling Authority hereafter referred to, and
(d) such other persons (not exceeding in the aggregate five percent of the number of such non-combatants) as shall be necessary for the purpose of tending such non-combatants and maintaining law and order within the safety zone, as well as the Controlling Authority hereafter referred to.