of Berne of the 9th September, 1886, including the Additional Article and the Final Protocol of the same date, as well as the Additional Act and the Interpretative Declaration of the 4th May, 1896. These instruments shall remain in force in regard to relations with States which do not ratify the present Convention.
The Signatory States of the present Convention may declare at the exchange of ratifications that they desire to remain bound, as regards any specific point, by the provisions of the Conventions which they have previously signed.
Article 28.
The present Convention shall be ratified, and the ratifications exchanged at Berlin not later than the 1st July, 1910.
Each Contracting Party shall, as regards the exchange of ratifications, deliver a single instrument, which shall be deposited with those of the other countries in the archives of the Government of the Swiss Confederation. Each Party shall receive in return a copy of the procès-verbal of the exchange of ratifications signed by the Plenipotentiaries who took part.
Article 29.
The present Convention shall be put in force three months after the exchange of ratifications, and shall remain in force for an indefinite period until the termination of a year from the day on which it may have been denounced.
Such denunciation shall be made to the Government of the Swiss Confederation. It shall only take effect in regard to the country which made it, the Convention remaining in full force and effect for the other countries of the Union.
Article 30.
The States which shall introduce in their legislation the duration of protection for fifty years contemplated by Article 7, first paragraph, of the present Convention, shall give notice thereof in writing to the Government of the Swiss Confederation, who will communicate it at once to all the other States of the Union.
