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Convention (XIII) concerning the Rights and Duties of Neutral Powers in Naval War. The Hague, 18 October 1907.
Art. 12. In the absence of special provisions to the contrary in the legislation of a neutral Power, belligerent war-ships are not permitted to remain in the ports, roadsteads, or territorial waters of the said Power for more than twenty-four hours, except in the cases covered by the present Convention.