Effective on 20 May 2005, the Electoral Amendment and Repeal Act 2005 (No.1 of 2005) abolished the country-metropolitan distinction for the Legislative Assembly, but all seats then in place remained until the following election on 6 September 2008. A redistribution of seats announced by the Western Australian Electoral Commission on 29 October 2007 places 42 seats in Perth and 17 in the country, with a variation of ±10% from the average population normally permitted. The only distinction for rural seats is that any seat with an area of 100,000 square kilometres (38,610 sq mi) or greater (that is, 4% of the State's land area) may have a variation of +10%–20% from the average, using an adjusted population based on the seat's area in square kilometres.[4]