Queensland
The Legislative Assembly of Queensland has 89 members, elected for three-year terms from single-member constituencies. Like New South Wales, Queensland uses the optional preferential form of the Alternative Vote. The Queensland Legislative Council, which consisted of members nominated by the Governor, was abolished by a Labor government in 1922.
Queensland has used the Alternative Vote since 1962. It used the 'first past the post' (plurality) system 1860 to 1892. From then until 1942 an unusual form of preferential voting called the 'contingent vote' was used. In 1942 the plurality system was reintroduced until it was replaced in 1962 by the 'full preferential' form of the Alternative Vote. In 1992 this was changed to the optional preferential system currently used.
Read more about this topic: Electoral Systems Of The Australian States And Territories