Annex to the Convention: Regulations respecting the laws and customs of war on land - Section I : On belligerents - Chapter II : Prisoners of war - Regulations: Art. 6.
Art. 6. The State may utilize the labour of prisoners of war according to their rank and aptitude, officers excepted. The tasks shall not be excessive and shall have no connection with the operations of the war.
Prisoners may be authorized to work for the public service, for private persons, or on their own account.
Work done for the State is paid for at the rates in force for work of a similar kind done by soldiers of the national army, or, if there are none in force, at a rate according to the work executed.
When the work is for other branches of the public service or for private persons the conditions are settled in agreement with the military authorities.
The wages of the prisoners shall go towards improving their position, and the balance shall be paid them on their release, after deducting the cost of their maintenance.