 Ratification of the Treaty of Lisbon

The ratification of the Treaty of Lisbon was officially completed by all member states of the European Union on 13 November 2009 when the Czech Republic deposited its instrument of ratification with the Italian government.The Lisbon Treaty came into force on the first day of the month following the deposition of the last instrument of ratification with the government of Italy, which was 1 December 2009.