The Member States 7 February 1992, Consolidated version of the Treaty on European Union#TITLE VI - FINAL PROVISIONS#Article 55(ex Article 53 TEU)

2. This Treaty shall enter into force on 1 January 1993, provided that all the Instruments of ratification have been deposited, or, failing that, on the first day of the month following the deposit of the Instrument of ratification by the last signatory State to take this step. Article 55 (ex Article 53 TEU) 1.