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Draft Convention for the Protection of Civilian Populations Against New Engines of War. Amsterdam, 1938.
Safety zones - Art. 17.
Art. 17. Every safety zone shall in time of war be subject to the supervision of a Controlling Authority composed of one or more nationals of a non-belligerent State, and it shall be the duty of such Controlling Authority to satisfy itself that the rules herein contained relating to the establishment of safety zones are in all respects complied with. The Controlling Authority shall be accorded every facility for the carrying out of its duties by the Government of the State concerned, and shall enjoy diplomatic privileges.