(a) Subject to sub-paragraph (b), this Convention shall enter into force with respect to any country outside the Union three months after the date on which the Director General has notified the deposit of its instrument of accession, unless a subs
equent date has been indicated in the instrument deposited. In the latter case, this Convention shall enter into force with respect to that country on the date thus indicated.
(b) If the entry into force according to sub-paragraph (a) precedes the entry into force of Articles 1 to 21 and the Appendix according to Article 28(2)(a), the said country shall, in the meantime, be bound, instead of by A
rticles 1 to 21 and the Appendix, by Articles 1 to 20 of the Brussels Act of this Convention.