In the aftermath of the Brexit vote in Britain on June 23, 2016, the United Kingdom formally invoked Article 50 in March 2017, giving notice that it would leave the EU within two years. Article 51 deals with the protocols attached to the treaties and article 52 with the geographic application of the treaty. Article 53 states the treaty is in force for an unlimited period, article 54 deals with ratification and 55 with the different language versions of the treaties.