voluntary

... 1. Members of the armed forces of a Party to the conflict as well as members of militias or volunteer corps forming part of such armed forces. ...

... 2. Members of other militias and members of other volunteer corps, including those of organized resistance movements, belonging to a Party to the conflict and operating in or outside their own territory, even if this territory is occupied, provided that such militias or volunteer corps, including such organized resistance movements, fulfil the following conditions: ...

... 2. Members of other militias and members of other volunteer corps, including those of organized resistance movements, belonging to a Party to the conflict and operating in or outside their own territory, even if this territory is occupied, provided that such militias or volunteer corps, including such organized resistance movements, fulfil the following conditions: ...

... Unless he be a volunteer, no prisoner of war may be employed on labour which is of an unhealthy or dangerous nature. ...