Related Rule
Australia
Practice Relating to Rule 127. Respect for Convictions and Religious Practices of Persons Deprived of Their Liberty
Australia’s Defence Force Manual (1994) provides: “PWs [prisoners of war] are completely free to exercise their religious duties and must be provided with adequate premises where religious services can be held.” 
Australia, Manual on Law of Armed Conflict, Australian Defence Force Publication, Operations Series, ADFP 37 – Interim Edition, 1994, § 1030.
The manual considers the infringement of the religious rights of prisoners of war as a war crime. 
Australia, Manual on Law of Armed Conflict, Australian Defence Force Publication, Operations Series, ADFP 37 – Interim Edition, 1994, § 1315.
Australia’s LOAC Manual (2006) states:
PW [prisoners of war] are completely free to exercise their religious duties and must be provided with adequate premises where religious services can be held. Chaplains retained by the enemy power are not PW and must be permitted to minister to PW. 
Australia, The Manual of the Law of Armed Conflict, Australian Defence Doctrine Publication 06.4, Australian Defence Headquarters, 11 May 2006, § 10.42.
The LOAC Manual (2006) replaces both the Defence Force Manual (1994) and the Commanders’ Guide (1994).