Part III : Captivity #Section II : Prisoners of war camps #Chapter 4 : Intellectual and moral needs of prisoners of war - Art. 16.
Art. 16. Prisoners of war shall be permitted complete freedom in the performance of their religious duties, including attendance at the services of their faith, on the sole condition that they comply with the routine and police regulations prescribed by the military authorities.
Ministers of religion, who are prisoners of war, whatever may be their denomination, shall be allowed freely to minister to their co-religionists.