Соответствующая норма
Practice Relating to Rule 127. Respect for Convictions and Religious Practices of Persons Deprived of Their Liberty
According to the Report on the Practice of France, in December 1981, the French Minister of Foreign Affairs was asked in the National Assembly about two Soviet prisoners held by the Afghan faction, Hezb-i-Islami, who were being threatened with execution if they did not convert to Islam. In his reply, the Minister stated that, whatever the nature of the conflict, prisoners must be respected. 
Report on the Practice of France, 1999, Chapter 5.3, Reply by the Minister of Foreign Affairs to a question in Parliament, 28 December 1981, Politique étrangère de la France, February 1982, p. 390.