ARTICLE 58U.K.
Upon the outbreak of hostilities, and pending an arrangement on this matter with the Protecting Power, the Detaining Power may determine the maximum amount of money in cash or in any similar form, that prisoners may have in their possession. Any amount in excess, which was properly in their possession and which has been taken or withheld from them, shall be placed to their account, together with any moneys deposited by them, and shall not be converted into any other currency without their consent.
If prisoners of war are permitted to purchase services or commodities outside the camp against payment in cash, such payments shall be made by the prisoner himself or the camp administration and charged to the accounts of the prisoners concerned. The Detaining Power will establish the necessary rules in this respect.