Parliaments of the Australian states and territories

The parliaments of the Australian states and territories are legislative bodies within the federal framework of the Commonwealth of Australia.

All the parliaments are based on the Westminster system, and each is regulated by its own constitution. Queensland and the two territories have unicameral parliaments, with the single house being called Legislative Assembly. The other states have a bicameral parliament, with a lower house called the Legislative Assembly (New South Wales, Victoria and Western Australia) or House of Assembly (South Australia and Tasmania). In all these cases the upper house is called the Legislative Council.

Before the formation of the Commonwealth in 1901, the six Australian colonies were self-governing colonies, with parliaments which had come into existence at various times between 1825, when the New South Wales Legislative Council was created, to 1891, when Western Australia became the last of the colonies to gain full self-government.

The colonies ratified the Constitution of Australia, becoming States of the Commonwealth in the new federation, and ceding certain of their legislative powers to the Commonwealth Parliament, but otherwise retaining their self-governing status with their own constitutions and parliaments. The state parliaments were all created by legislation of the British Imperial Parliament, and their original constitutions were contained in Acts of that Parliament; however now the power to amend state constitutions resides with the respective state parliaments, in accordance with its constitution. The Commonwealth Parliament cannot amend a state's constitution.

...
Wikipedia