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Historical Treaties and Documents
Convention (XIII) concerning the Rights and Duties of Neutral Powers in Naval War. The Hague, 18 October 1907.
Art. 5. Belligerents are forbidden to use neutral ports and waters as a base of naval operations against their adversaries, and in particular to erect wireless telegraphy stations or any apparatus for the purpose of communicating with the belligerent forces on land or sea.