1. [Principle] Subject to paragraph (2), no reservations to this Convention are permitted.
2. [Possible exception]
a) Notwithstanding the provisions of Article 3(1), any State which, at the time of becoming party to this Convention, is a party to the Act of 1978 and which, as far as varieties reproduced asexually are concerned, provides for protection by an industrial property title other than a breeder's right shall have the right to continue to do so without applying this Convention to those varieties.
b) Any State making use of the said right shall, at the time of depositing its instrument of ratification, acceptance, approval or accession, as the case may be, notify the Secretary-General accordingly. The same State may, at any time, withdraw the said notification.