E.L. Rev. 2008, 33(2), 137-166 The Treaty of Lisbon, process, architecture and substance Paul Craig Subject: European Union. Other related subjects: Constitutional law Keywords: Competence; Constitutional law; EC law; EU constitution; European Union; Fundamental rights; Treaties Legislation: Treaty Establishing a Constitution for Europe 2004 Draft Treaty amending the Treaty on European Union and the Treaty establishing the European Community Treaty of Amsterdam 1997 Treaty on European Union (Maastricht) 1992 European Convention on Human Rights 1950 Charter of Fundamental Rights of the European Union 2000 Abstract The Treaty of Lisbon was signed by the Member States in December 2007, thereby concluding the process of Treaty revision that had been re-started six months earlier. It remains to be seen whether the Treaty of Lisbon is duly ratified in accord with the constitutional requirements of each Member State. If this occurs it will enter into force on January 1, 2009. This article begins by examining the IGC process between June-December 2007. It then considers the architecture of the Treaty of Lisbon, with comparisons where relevant to the Treaty establishing a Constitution for Europe. The remainder of the article evaluates the principal changes that will be made as a result of the Treaty of Lisbon, drawing on material, where relevant, from the earlier discussions that led to the Treaty establishing a Constitution for Europe.