^Article 6, paragraph 1 of the Treaty requires that instruments of ratification be deposited with the Government of Italy in order for the Treaty to enter into force. Each country deposits the instrument of ratification after its internal ratification process is finalized by all required state bodies (parliament and the head of state). Countries are ordered according to the date of deposition of ratification documents. When two countries have deposited the necessary documents on the same date the order is alphabetical.
^Results refer to the final round when more than one vote is required.
^Åland is an autonomous province of Finland. It is part of European Union, but is subject of certain exemptions. Åland Parliament ratification is not necessary for the Treaty to enter into force, but is needed for its provisions to apply on the territory of Åland islands.
^Gibraltar is a British overseas territory. It is part of European Union, but is subject of certain exemptions. Gibraltar Parliament ratification is not necessary for the Treaty to enter into force, but changes in the legislation are needed for its provisions to apply on the territory of Gibraltar.
