0031-0330 irl.qxd 198 2.3.2009 14:20 Page 198 FOURTH GENEVA CONVENTION OF 1949 for the benefit of all internees remaining in the custody of the Detaining Power. In case of a general release, the said profits shall be kept by the Detaining Power, subject to any agreement to the contrary between the Powers concerned. Air raid shelters. Protective measures ART. 88. — In all places of internment exposed to air raids and other hazards of war, shelters adequate in number and structure to ensure the necessary protection shall be installed. In case of alarms, the internees shall be free to enter such shelters as quickly as possible, excepting those who remain for the protection of their quarters against the aforesaid hazards. Any protective measures taken in favour of the population shall also apply to them. All due precautions must be taken in places of internment against the danger of fire. CHAPTER III Food and Clothing Food ART. 89. — Daily food rations for internees shall be sufficient in quantity, quality and variety to keep internees in a good state of health and prevent the development of nutritional deficiencies. Account shall also be taken of the customary diet of the internees. Internees shall also be given the means by which they can prepare for themselves any additional food in their possession. Sufficient drinking water shall be supplied to internees. The use of tobacco shall be permitted. Internees who work shall receive additional rations in proportion to the kind of labour which they perform. Expectant and nursing mothers and children under fifteen years of age shall be given additional food, in proportion to their physiological needs. Clothing ART. 90. — When taken into custody, internees shall be given all facilities to provide themselves with the necessary clothing, footwear and change of underwear, and later on, to procure further supplies if required. Should any internees not have sufficient clothing, account being taken of the climate, and be unable to procure any, it shall be provided free of charge to them by the Detaining Power.