After the entry into force of this Agreement, the Committee of Ministers of the Council of Europe, after consulting the Contracting States to the Agreement, may invite any State which is not a member of the Council but which has expressed its consent to be bound by the Vienna Convention to accede to this Agreement, by a decision taken by the majority provided for in Article 20.d of the Statute of the Council of Europe and by the unanimous vote of the representatives of the Contracting States entitled to sit on the Committee.
Po začetku veljavnosti sporazuma lahko Odbor ministrov Sveta Evrope po posvetu z državami pogodbenicami s sklepom, ki ga sprejme večina, kot jo določa odstavek d) 20. člena Statuta Sveta Evrope, in s soglasjem vseh predstavnikov držav pogodbenic, ki imajo pravico sodelovati v odboru, povabi katero koli državo, ki ni članica Sveta, je pa soglašala, da jo zavezuje Dunajska konvencija, da pristopi k temu sporazumu.