State Premier

The Premiers of the Australian states are the heads of the executive governments in the six states of the Commonwealth of Australia. They perform the same function at the state level as the Prime Minister of Australia performs at the national level. The territory equivalents to the Premiers are the Chief Ministers of the Northern Territory and the Australian Capital Territory. The Queen of Australia and the State Governors are the formal repositories of executive power, however, in practice they act only on the advice of State Premiers and Ministers.

Each of the Australian states is governed under the Westminster system of parliamentary government. Each state has an elected legislature. Following a General Election, the State Governor appoints as Premier the Member of the lower house of the State legislature who can command a simple majority of votes on the floor of the house. The Governor is the head of Government, but in practice acts only on the advice of the Premier. The Premier must resign his or her commission to the Governor if he or she loses the confidence of the Legislative Assembly, either because his or her party is defeated at a General Election or because he or she loses a vote of confidence in the house. (Premiers may also resign for other reasons, such as losing the confidence of their own party).

The Australian states were founded as British colonies, and executive power was held by a Governor (or sometimes a Lieutenant-Governor) appointed by the British Government (see Governors of the Australian states). From the 1820s the power of the Governors was gradually transferred to legislative bodies, at first appointed, later partly elected, and finally fully elected. Victoria gained full responsible parliamentary government in 1855, New South Wales, South Australia and Tasmania in 1856, Queensland in 1859 and Western Australia (owing to its much smaller population) in 1890.

...
Wikipedia