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Convention (XIII) concerning the Rights and Duties of Neutral Powers in Naval War. The Hague, 18 October 1907.
Art. 31. The present Convention shall come into force in the case of the Powers which were a party to the first deposit of the ratifications, sixty days after the date of the ' procès-verbal ' of that deposit, and, in the case of the Powers who ratify subsequently or who adhere, sixty days after the notification of their ratification or of their decision has been received by the Netherlands Government.