(1)(a) Any State may declare that it shall not be bound by the provisions of Chapter II.
(2)(a) Any State not having made a declaration under paragraph (1)(a) may declare that:
(i) it shall not be bound by the provisions of Article 39(1) with respect to the furnishing of a copy of the international application and a translation thereof (as prescribed),
(ii) the obligation to delay national processing, as provided for under Article 40, shall not prevent publication, by or through its national Office, of the international application or a translation thereof, it being understood, however, that it is not exempted from the limitations provided for in Articles 30 and 38.
(b) Where, at the expiration of 18 months from the priority date, the international application contains the designation only of such States as have made declarations under subparagraph (a), the international application shall not be published by virtue of Article 21(2).
(c) Where the provisions of subparagraph (b) apply, the international application shall nevertheless be published by the International Bureau:
(ii) when a national application or a patent based on the international application is published by or on behalf of the national Office of any designated State having made a declaration under subparagraph (a), promptly after such publication but not before the expiration of 18 months from the priority date.
(4)(a) Any State whose national law provides for prior art effect of its patents as from a date before publication, but does not equate for prior art purposes the priority date claimed under the Paris Convention for the Protection of Industrial Property to the actual filing date in that State, may declare that the filing outside that State of an international application designating that State is not equated to an actual filing in that State for prior art purposes.
(c) Any State making a declaration under subparagraph (a) shall, at the same time, state in writing the date from which, and the conditions under which, the prior art effect of any international application designating that State becomes effective in that State. This statement may be modified at any time by notification addressed to the Director General.
(5) Each State may declare that it does not consider itself bound by Article 59. With regard to any dispute between any Contracting State having made such a declaration and any other Contracting State, the provisions of Article 59 shall not apply.
(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.
(b) Any declaration made under this Article may be withdrawn at any time by notification addressed to the Director General. Such withdrawal shall take effect three months after the day on which the Director General has received the notification and, in the case of the withdrawal of a declaration made under paragraph (3), shall not affect international applications filed prior to the expiration of the said three-month period.
* Editor's Note: Information received by the International Bureau concerning reservations made under Article 64(1) to (5) is published in the Gazette and on the WIPO website at: www.wipo.int/pct/en/texts/reservations/res_incomp.html.