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Convention (XIII) concerning the Rights and Duties of Neutral Powers in Naval War. The Hague, 18 October 1907.
Art. 27. The Contracting Powers shall communicate to each other in due course all laws, proclamations, and other enactments regulating in their respective countries the status of belligerent war-ships in their ports and waters, by means of a communication addressed to the Government of the Netherlands, and forwarded immediately by that Government to the other Contracting Powers.