Commission, an independent body. Since a referendum in 1991, boundaries have been redistributed after each election. Previously they were redistributed after every third election. Government is formed in the House of Assembly by the leader of the party or coalition who can demonstrate they have the support of the majority of the House, and is called upon by the Governor to form government. The leader of the government becomes the Premier. The House is presided over by a Speaker, who, as of the passage of the Constitution (Independent Speaker) Amendment Act 2021, is constitutionally banned from being a member of a registered political party outside of a "relevant election period". While South Australia's total population is 1.7 million, Adelaide's population is 1.3 million − uniquely, over 75 percent of the state's population resides in the metropolitan area and has 72 percent of seats (34 of 47) alongside a lack of comparatively-sized rural population centres, therefore the metropolitan area tends to decide election outcomes. At the 2014 election for example, although the statewide two-party vote (2PP) was 47.0% Labor v 53.0% Liberal, the metropolitan area recorded a 2PP of 51.5% Labor v 48.5% Liberal. The term for the House of Assembly is a fixed 4-year term but the state Constitution does allow the Governor to dissolve the House early and call for a fresh general election under certain circumstances. These are: If the House passes a motion of no confidence in the government, the House defeats a motion of confidence in the government, or if a bill that has been designated by the House as a "bill of special importance" is passed by the House of Assembly but is rejected by the Legislative Council. The House of Assembly can also be dissolved early together with the full Legislative Council in what is knows as a double dissolution in order to resolve deadlocks between the two Houses. The circumstances for such a double dissolution are outlined below. Legislative Council The Legislative Council (or "upper house") is made up of 22 councillors (MLCs) who are elected for the entire state by the Proportional Representation single transferable voting system (with optional preferential voting) to serve for a term that is usually 8 years. Elections for the Legislative Council are staggered so that 11 seats are up for re-election every 4 years, at the same time as House of Assembly elections. Legislative Councillors may serve