Related Rule
Germany
Practice Relating to Rule 104. Respect for Convictions and Religious Practices
Germany’s Military Manual (1992) provides: “Civilians who do not take part in hostilities … are entitled to respect for their religious convictions”. 
Germany, Humanitarian Law in Armed Conflicts – Manual, DSK VV207320067, edited by The Federal Ministry of Defence of the Federal Republic of Germany, VR II 3, August 1992, English translation of ZDv 15/2, Humanitäres Völkerrecht in bewaffneten Konflikten – Handbuch, August 1992, § 502; see also § 532.
The manual further provides that the belligerent shall ensure the “freedom of religion” to aliens remaining in the territory of a party to the conflict. 
Germany, Humanitarian Law in Armed Conflicts – Manual, DSK VV207320067, edited by The Federal Ministry of Defence of the Federal Republic of Germany, VR II 3, August 1992, English translation of ZDv 15/2, Humanitäres Völkerrecht in bewaffneten Konflikten – Handbuch, August 1992, § 585.