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Convention (IV) relative to the Protection of Civilian Persons in Time of War. Geneva, 12 August 1949.
The disciplinary regime in places of internment shall be consistent which humanitarian principles, and shall in no circumstances include regulations imposing on internees any physical exertion dangerous to their health or involving physical or moral victimization. Identification by tattooing or imprinting signs or markings on the body, is prohibited.
In particular, prolonged standing and roll-calls, punishment drill, military drill and manoeuvres, or the reduction of food rations, are prohibited.