The Lisbon Treaty (Treaty of Lisbon amending the Treaty on European Union and the Treaty establishing the European Community - entry into force 1st December 2009)
Treaty of Nice (Treaty of Nice amending the Treaty on European Union, the Treaties establishing the European Communities and certain related acts - entry into force 1st February 2003)
The Amsterdam Treaty (Treaty of Amsterdam amending the Treaty of the European Union, the Treaties establishing the European Comunities and certain related acts - entry into force 1st May 1999)
The Maastricht Treaty (Treaty on European Union - entry into force 1st November 1993)
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