Euratom Treaty in the context of "Treaty of Rome"

The Treaty of Lisbon (initially known as the Reform Treaty) is a European agreement that amends the two treaties which form the constitutional basis of the European Union (EU). The Treaty of Lisbon, which was signed by all EU member states on 13 December 2007, entered into force on 1 December 2009. It amends the Maastricht Treaty (1992), known in updated form as the Treaty on European Union (2007) or TEU, as well as the Treaty of Rome (1957), known in updated form as the Treaty on the Functioning of the European Union (2007) or TFEU. It also amends the attached treaty protocols as well as the Treaty establishing the European Atomic Energy Community (EURATOM).

Prominent changes included the move from unanimity to qualified majority voting in at least 45 policy areas in the Council of Ministers, a change in calculating such a majority to a new double majority, a more powerful European Parliament forming a bicameral legislature alongside the Council of Ministers under the ordinary legislative procedure, a consolidated legal personality for the EU and the creation of a long-term president of the European Council and a High Representative of the Union for Foreign Affairs and Security Policy. The Treaty also made the Union's bill of rights, the Charter of Fundamental Rights, legally binding. For the first time, the treaty gave member states the explicit legal right to leave the EU, and established a procedure by which to do so.

The European Atomic Energy Community (EAEC or EURATOM) is an international organization established by the Euratom Treaty of 1957 with the original purpose of creating a specialist market for nuclear power in Europe, by developing nuclear energy and distributing it to its member states while selling the surplus to non-member states. Having become one of the three European Communities alongside the European Coal and Steel Community and the European Economic Community following the merger of their executive bodies in 1967, the Euratom is de facto under the authority of the European Union (EU) but remains de jure a separate organization.

It is legally distinct from the European Union although it has the same membership, and is governed by many of the EU's institutions; but it is the only remaining community organization that is independent of the EU and therefore outside the regulatory control of the European Parliament. Over the years its scope has been increased to cover a variety of areas associated with nuclear power and ionising radiation as diverse as safeguarding of nuclear materials, radiation protection, coordinating EU members' nuclear research programmes for peaceful purposes, and construction of the International Fusion Reactor.