use of preferential voting), the conservative government, now led by Joh Bjelke-Petersen, modified the zoning system to add a fourth zone—a remote zone, comprising seats with even fewer electors. Thus the conservative government was able to isolate Labor support in provincial cities and maximise its own rural power base. On average, the Country Party needed only 7,000 votes to win a seat, compared with 12,800 for a typical Labor seat. The entrenchment of a Coalition government was also caused by socio-economic and demographic changes associated with mechanisation of farms and urbanisation which led to a drift of working class population from rural and remote electorates to the cities. By the late 1980s the decline in the political fortunes of the National Party, together with rapid growth in south east Queensland meant that the zonal system was no longer able to guarantee a conservative victory. In addition, in 1988 the Federal Labor Government held four constitutional referendums—one of which was for the adoption of fair electoral systems around Australia. Although the referendum did not succeed, it heightened public awareness of the issue. A large public interest non-partisan organisation, the Citizens for Democracy, lobbied extensively the Liberal and Labor parties to abolish the gerrymander and to make it a major issue in the lead up to the landmark 1989 Queensland election. Despite the malapportionment, Labor was rarely able to garner a higher percentage of the vote than the Coalition for most of this period. 1989–present In 1989 Labor won government, promising to implement the recommendations of the Fitzgerald Inquiry into police corruption, including the establishment of an Electoral and Administrative Reform Commission (EARC). EARC recommended the abolition of the zonal system in favour of a "modified one vote, one value" system. Under this proposal, subsequently adopted, most electorates consisted of approximately the same number of electors, but with a greater tolerance for fewer electors allowed in a limited number of remote electorates. This plan is still in use today. Presently, 42 seats are contested in Greater Brisbane and 47 in the rest of the state. The youngest person ever elected to Queensland's Legislative Assembly was Lawrence Springborg, former Minister for Natural Resources and Leader of the Opposition. In 1989, he entered parliament aged 21. Parliament House The Queensland Legislative Assembly sits in Parliament House in the Brisbane central business district. The building was completed in 1891. The lower house chamber is decorated