Entry into force
Article 23
1. This Protocol enters into force between the States which have deposited instruments referred to in subparagraph (a) on the later of: (a) the first day of the month following the expiration of three months after the date of the deposit of the fourth instrument of ratification, acceptance, approval or accession, and (b) the date of the deposit by the Secretariat with the Depositary of a certificate confirming that the International Registry is fully operational. 2. For other States this Protocol enters into force on the first day of the month following the later of: (a) the expiration of three months after the date of the deposit of its instrument of ratification, acceptance, approval or accession; and (b) the date referred to in subparagraph (b) of the preceding paragraph.