General elections occur whenever Parliament is dissolved. The timing of the dissolution was normally chosen by the Prime Minister (see relationship with the Government above); however, because of the Fixed-term Parliaments Act 2011, Parliamentary terms are now fixed at five years, except when the House of Commons sustains a vote of no confidence or passes an "early election" motion, the latter having to be passed by a two-thirds vote; or, as in 2019, by an Enabling Act which overrides the Fixed-term Parliaments Act. The first use of this procedure was in April 2017, when MPs voted in favour of Theresa May's call for a snap election to be held that June.