The Treaty introduces a withdrawal clause for members who wish to leave the Union. The procedure is thus formalised by stipulating that a Member State must inform the European Council before it can terminate its accession and that a withdrawal agreement would then be negotiated between the Union and that State, the Treaties no longer applying to that State from the date of the agreement or, if that is not the case, to that State within two years of notification, unless the State and the Council agree to extend that period. There have been several cases where a region was no longer part of the Community, for example. Β Greenland in 1985, when no Member State had yet left the country at the time of ratification of the Treaty of Lisbon. Before the entry into force of the Treaty of Lisbon, it was not clear whether a Member State had the legal right to leave the Union. On 30 March 2017, the United Kingdom announced the United Kingdom`s intention to leave the European Union. . After negotiating a Brexit withdrawal agreement, the United Kingdom left the Union on 31 January 2020. Following the June negotiations and the final agreement on a 16-party framework for the new Reform Treaty, the Intergovernmental Conference began on 23 July 2007 on the effective drafting of the new Treaty. The Intergovernmental Conference opened after a brief ceremony. The Portuguese Presidency presented a 145-page document (containing an additional 132 pages containing 12 minutes and 51 declarations) entitled `Draft Treaty amending the Treaty on European Union and the Treaty establishing the European Community` and presented it on the Council of Ministers` website as a starting point for the drafting process.  The Treaty of Lisbon (originally known as the Reform Treaty) is an international agreement that amends the two treaties constituting the constitutional basis of the European Union (EU).
The Treaty of Lisbon was signed by the EU Member States on 13 December 2007 and entered into force on 1 December 2009.  It amends the Maastricht Treaty (1992), known in an updated form as the Treaty on European Union (2007) or kills, and the Treaty of Rome (1957), known in an updated form as the Treaty on the Functioning of the European Union (2007) or the Treaty on the Functioning of the European Union.  The Protocols to the Treaty and the Treaty establishing the European Atomic Energy Community (Euratom) are also amended. 104 In an April 2015 press release, “The EU is ASEAN`s second largest trading partner with a total trade of $248 billion in 2014 and was the largest source of foreign direct investment in Southeast Asia in 2014, with $29.1 billion in 2014, or 21.3% of foreign inflows to the region.” See EU and ASEAN to relaunch EURACTIVe trade negotiations (27 April 2015), www.euractiv.com/sections/trade-society/eu-and-asean-kick-start-free-trade-agreement-talks-314100 (the last visit took place on 9 February 2016). Parliament has used its increased powers in legislative matters, but also, for example, with regard to the appointment of the Commission, to obtain new privileges from President Barroso and has used its budgetary powers as a veto on the creation of the External Action Service.  It also exercised its new power over international agreements in order to quickly block the SWIFT agreement on data exchange with the US and threatened to do so through a free trade agreement with South Korea.  27 Footnotes. 818; see also the Lisbon Agreement, above footnote Note 1 art. 8 (under which a `competent authority` of each Member State or an `interested party` may bring legal proceedings in each Member State under the Agreement). . .