Education Minister Kay Hallahan will today resign as a member of the Upper House of State Parliament.
Mrs Hallahan will quit after nearly 10 years in the Legislative Council to stake her political career on winning the marginal lower house seat of Armadale at the State election on February 6.
In a rare convention under the Westminster system, Mrs Hallahan will be a Minister without a seat until the election.
Mrs Hallahan - a former policewoman and social worker - entered Parliament in 1983, representing the south-east metropolitan area and rose to become Deputy Leader of the Government in the Legislative Council.
In 1986, she became the State's first woman Minister in the 116-year history of the Legislative Council.