The instrument of accession would need to be deposited with the Director General of WIPO. The Madrid Protocol will enter into effect three months after the Director General has received the instrument of accession. The Head of State or the Minister of Foreign Affairs of the future member usually signs such instrument of accession.
When depositing the instrument of accession to the Madrid Protocol, the future member has the opportunity to submit declarations, such as extending the time limit for issuing provisional refusals to 18 months (and beyond for oppositions) and a declaration concerning individual fees.
WIPO will provide relevant information on declarations that can be made together with the instrument of accession or later.