Article 21

(1) Any country outside the Union may accede to this Act and thereby become a member of the Union. Instruments of accession shall be deposited with the Director General.

(2)

(a) With respect to any country outside the Union which deposits its instrument of accession one month or more before the date of entry into force of any provisions of the present Act, this Act shall enter into force, unless a subsequent date has been indicated in the instrument of accession, on the date upon which provisions first enter into force pursuant to Article 20(2)(a) or (b); provided that:

(i) if Articles 1 to 12 do not enter into force on that date, such country shall, during the interim period before the entry into force of such provisions, and in substitution therefor, be bound by Articles 1 to 12 of the Lisbon Act,

(ii) if Articles 13 to 17 do not enter into force on that date, such country shall, during the interim period before the entry into force of such provisions, and in substitution therefor, be bound by Articles 13 and 14(3), (4), and (5), of the Lisbon Act.

If a country indicates a subsequent date in its instrument of accession, this Act shall enter into force with respect to that country on the date thus indicated.

(b) With respect to any country outside the Union which deposits its instrument of accession on a date which is subsequent to, or precedes by less than one month, the entry into force of one group of Articles of the present Act, this Act shall, subject to the proviso of subparagraph (a), enter into force three months after the date on which its accession has been notified by the Director General, unless a subsequent date has been indicated in the instrument of accession. In the latter case, this Act shall enter into force with respect to that country on the date thus indicated.

(3) With respect to any country outside the Union which deposits its instrument Of accession after the date of entry into force of the present Act in its entirety, or less than one month before such date, this Act shall enter into force three months after the date on which its accession has been notified by the Director General, unless a subsequent date has been indicated in the instrument of accession. In the latter case, this Act shall enter into force with respect to that country on the date thus indicated.