The present Convention shall be open for signature by the American States and shall be ratified in accordance with their respective constitutional procedures. The original instrument, the English, French, Portuguese and Spanish texts of which are equally authentic, shall be deposited with the General Secretariat of the Organization of American States, which shall transmit certified copies to the Governments for the purpose of ratification. The instruments of ratification shall be deposited with the General Secretariat of the Organization of American States, which shall notify the signatory Governments of the said deposit. Such notification shall serve as an exchange of ratifications.