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Draft Convention for the Protection of Civilian Populations Against New Engines of War. Amsterdam, 1938.
Safety zones - Art. 20.
Art. 20. It shall be the duty of a Controlling Authority which becomes aware of any breach of any of the provisions of this Convention by any belligerent forthwith to notify the Commission of Control to which it is responsible, and the Commission of Control, if satisfied that such breach has occurred shall forthwith notify the President of the Permanent Court of International Justice, specifying the breach and naming the State by which such breach is committed, and shall also forthwith notify the Governments of all belligerents.