Treaties of the European Union

Treaties of the European Union form the primary constitutional foundation of the European Union, establishing its legal personality, institutional framework, and core competences. These binding agreements, negotiated and ratified by all member states, have evolved from creating specific economic communities to shaping a comprehensive political and economic union. The treaties delineate the powers of institutions like the European Commission and the Court of Justice of the European Union, while also setting out fundamental principles such as subsidiarity and direct effect.

Founding treaties

The foundational pillars of the European project are three key treaties that established its original communities. The Treaty of Paris, signed in 1951, created the European Coal and Steel Community among six nations: Belgium, France, Italy, Luxembourg, the Netherlands, and West Germany. This was followed by the Treaty of Rome of 1957, which founded the European Economic Community and the European Atomic Energy Community (Euratom). These early treaties, championed by figures like Robert Schuman and Jean Monnet, aimed to secure lasting peace by pooling sovereignty over critical industries. They established core institutions including the Assembly and the European Court of Justice, laying the groundwork for a common market.

Amending treaties

A series of major amending treaties have substantially reformed the original agreements, expanding the Union's scope and deepening integration. The Merger Treaty of 1965 consolidated the executive bodies of the three communities. The Single European Act of 1986 introduced significant institutional changes and set a deadline for completing the European Single Market. The Treaty of Maastricht (1992) formally established the European Union itself, creating the pillars structure and launching Economic and Monetary Union. Subsequent reforms came via the Treaty of Amsterdam (1997), the Treaty of Nice (2001), and the pivotal Treaty of Lisbon (2007), which abolished the pillar system and gave legal force to the Charter of Fundamental Rights of the European Union.

Accession treaties

The enlargement of the Union from its original six members to twenty-seven is governed by individual accession treaties. Each treaty is a complex international agreement between the existing member states and the acceding country, requiring ratification by all national parliaments and often a referendum in the candidate nation. Major enlargement rounds were formalized by treaties such as those for the first enlargement to include the United Kingdom, Denmark, and Ireland in 1973, the historic 2004 expansion to ten states including Poland and Hungary, and the accessions of Romania and Bulgaria in 2007. The process is overseen by the European Commission and requires candidate countries to align fully with the acquis communautaire.

Unratified treaties

Not all proposed treaty reforms have successfully entered into force, with some failing ratification and altering the course of integration. The most prominent example is the Treaty establishing a Constitution for Europe, signed in 2004 in Rome. Designed to replace all existing treaties with a single constitutional text, it was rejected by voters in referendums in France and the Netherlands in 2005, leading to its abandonment. Key elements from this treaty were later incorporated into the Treaty of Lisbon. Other unratified efforts include the European Defence Community treaty of 1952, which was vetoed by the French National Assembly.

Treaty revision procedures

The process for amending the Union's foundational treaties is strictly defined to balance adaptability with member state sovereignty. The ordinary revision procedure, outlined in Article 48 of the Treaty on European Union, requires a convention comprising representatives of national parliaments, Heads of State or Government, the European Parliament, and the European Commission. Following a convention's recommendations, an Intergovernmental Conference is convened to negotiate the precise amendments. Any resulting treaty change must then be ratified by all member states according to their own constitutional requirements, which can include national referendums as seen during the ratification of the Maastricht Treaty.

Category:European Union law Category:Treaties of the European Union Category:Treaties