In Australia, electoral districts for the Australian House of Representatives are called divisions or more commonly referred to as electorates or seats. There are currently 151 single-member electorates for the Australian House of Representatives. Constitutional and legal requirements Section 24 of the Constitution of Australia specifies that the total number of members of the Australian House of Representatives shall be "as nearly as practicable" twice as many as the number of members of the Australian Senate. The section also requires that electorates be apportioned among the states in proportion to their respective populations; provided that each original state has at least 5 members in the House of Representatives, a provision that has given Tasmania higher representation than its population would otherwise justify. There are three electorates in the Australian Capital Territory and even though the Northern Territory should have only one electorate based on their population, parliament have legislated that they receive two (by setting the quota for seat allocation using the harmonic mean for territories, meaning only around 1.3 quotas rather than 1.5 quotas are needed to have two seats). In addition, Section 29 forbids electorate boundaries from crossing state lines, forcing populated areas along state and territory borders to be placed in different electorates, such as Albury in New South Wales being part of the electorate of Farrer, while nearby Wodonga in Victoria is part of the electorate of Indi. The same restriction does not apply to territories, and several current electoral divisions incorporate electors from multiple territories. This is currently the case for the Division of Bean (covering part of the ACT and the whole of Norfolk Island), the Division of Fenner (covering part of the ACT and the whole of Jervis Bay Territory), and the Division of Lingiari (covering part of the Northern Territory and the whole of Christmas Island and Cocos (Keeling) Islands). The Commonwealth Electoral Act 1918 sets out further provisions. Apportionment and redistribution The Australian Electoral Commission (AEC) determines the number of members of the House of Representatives to which each state and territory is entitled (called apportionment) and the boundaries of each electorate, in a process known as redistribution. Such apportionment and redistributions apply to the next federal election, but not to any by-elections. The last apportionment determination was made in July 2020, and the resulting redistribution is to take place during 2021, in time for the 2022 federal election, which was