Art 13. The present Convention shall apply to the wounded, sick and shipwrecked at sea belonging to the following categories: (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: (c) that of carrying arms openly;