(6) (a) Any declaration made under this Article shall be made in writing. It may be made at the time of signing this Treaty, at the time of depositing the instrument of ratification or accession, or, except in the case referred to in paragraph (5), at any later time by notification addressed to the Director General. In the case of the said notification, the declaration shall take effect six months after the day on which the Director General has received the notification, and shall not affect international applications filed prior to the expiration of the said six-month period. |