The treaty of Lisbon is the result of negotiations between the European Union's member states, the European Commission and the European Parliament during an intergovernmental conference.

After the official signing on 13 December 2007, the treaty will still not apply until and unless it is ratified by each of the European Union's 27 member states. It is up to each country to choose the procedure for ratification, in line with its own national constitution. The target date for ratification set by member governments is 1 January 2009 — a few months before the elections to the European Parliament

Επίσημη Εφημερίδα της Ευρωπαϊκής Ένωσης C 306, 17.12.2007

Συνθήκη της Λισσαβώνας