system allowed Adelaide to elect a majority of the legislature, which all but assured a Labor victory at the next election; despite this, Hall knew he would be effectively handing the premiership to his Labor counterpart, Don Dunstan. In the first election under this system, in 1970, Dunstan won handily, picking up all eight new seats. After Premier Don Dunstan introduced the Age of Majority (Reduction) Bill in October 1970, the voting age in South Australia was lowered to 18 years old in 1973. Queensland In Queensland, the malapportionment initially benefitted the Labor Party, since many small rural constituencies were dominated by workers in provincial cities who were organised into the powerful Australian Workers' Union. But after 1957, the Country Party (later renamed the National Party) governments of Sir Frank Nicklin and Sir Joh Bjelke-Petersen tweaked the system to give the upper hand to their rural base and isolate Labor support in Brisbane and provincial cities. In later years, this system made it possible for Bjelke-Petersen to win elections with only a quarter of the first preference votes. On average, a Country/National seat took only 7,000 votes to win, compared with 12,000 for a Labor seat. Combined with the votes of the Liberals (in Queensland, the National Party had historically been the senior partner in the non-Labor coalition), this was enough to lock Labor out of power even in years when Labor was the biggest single party in the legislature. This "Bjelkemander" was not overcome until the final defeat of the Nationals in 1989. Under new Labor premier Wayne Goss, a revised map was enacted with 40 seats in Brisbane and 49 in the country. Seats had roughly the same number of voters, with a greater tolerance allowed for seats in rural areas. Western Australia Western Australia retained a significant malapportionment in the Legislative Assembly until 2008. Under the previous system, votes in the country were worth up to four times the value of votes in Perth, the state's capital city. On 20 May 2005 the state Parliament passed new electoral laws, removing the malapportionment with effect from the following election. Under the new laws, electorates must have a population of 21,343, with a permitted variation of 10%. Electorates with a land area of more than are permitted to have a variation of 20%, in recognition of the difficulty of representing the sparsely populated north and east of the state.