The Northern Territory Legislative Assembly is made up of 25 single-member electoral divisions. The Electoral Act 2004 dictates the characteristics of each of these electorates, and requires, among other things, that each electorate has a similar number of eligible voters and that the physical area of an electorate should be kept as small as is practicable. Mandatory redistributions take place in the middle of each term in order to respond to changing demographics. The boundaries of each division attempts to match a quota of the average divisional enrolment as closely as possible. Redistributions are organised by the independent Northern Territory Electoral Commission.