Art 28. Canteens shall be installed in all camps, where prisoners of war may procure foodstuffs, soap and tobacco and ordinary articles in daily use. The tariff shall never be in excess of local market prices. The profits made by camp canteens shall be used for the benefit of the prisoners; a special fund shall be created for this purpose. The prisoners' representative shall have the right to collaborate in the management of the canteen and of this fund. When a camp is closed down, the credit balance of the special fund shall be handed to an international welfare organization, to be employed for the benefit of prisoners of war of the same nationality as those who have contributed to the fund. In case of a general repatriation, such profits shall be kept by the Detaining Power, subject to any agreement to the contrary between the Powers concerned.