Since the Maastricht Treaty (1993), subsidiarity has guided the political process surrounding the distribution of competences between administrative layers in the European Union (EU). The EU’s subsidiarity regime affects the politics and governance of the EU, because the notion of subsidiarity allows for continuous negotiation over its practical use. The constant battle over subsidiarity implies that the notion changes its meaning over time and alters the power relations between different actors within the EU. Since the Lisbon Treaty (2009), subsidiarity has mainly strengthened the position of member states at the expense of the Commission.
Kees van Kersbergen and Bertjan Verbeek
The expression “the Lisbon Treaty” (LT) is a shortcut to the treaties upon which the European Union (EU) has been based since December 1, 2009. During the “reflection period” that lasted from June 2005 to December 2006 three options were available: remaining with the European treaties as amended by the Nice Treaty; starting new negotiations in order to adopt some changes deemed technically necessary; or trying to get “the substance” of the Constitutional Treaty (CT) of 2004 approved in the form a new treaty. Most member states and the EU institutions were in favor of the third option. The negotiations that led to the adoption of the LT in December 2007 departed from the usual treaty amendment scenarios. The content of the LT is to a large extent similar to that of the CT, as most of the novel provisions of that treaty have been taken over as they were written in the CT and introduced in the existing European Community (EC) and EU treaties. Apart from a few institutional innovations such as the Permanent President of the European Council and the new voting system in the Council, most innovations with regard to the European communities are to be found in the details. The ratification process of the LT was difficult, as it was slowed down by the necessity to hold two referenda in Ireland, and to overcome the resistance of the President of the Czech Republic, an overt Euroskeptic. The negotiations of 2007–2009 shed some light on the importance in EU policy-making and especially in treaty negotiations of the epistemic community of legal experts and, more precisely, of experts in EU law. Events in the years 2010 and 2011 led to minor treaty amendments, shaping the present content of what is usually referred to as the LT. Whether Brexit and the EP elections of 2019 will lead to important changes remains unknown.