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Casual Vacancies
Commonwealth By-elections are held to fill vacancies in the House of Representatives resulting from death, resignation, absence without leave, expulsion, disqualification or ineligibility of a Member.
The Speaker of the House of Representatives has the power to issue a writ for the election of a new Member. There is no prescribed time period for the issuing of writs following a vacancy and it is not possible to hold a by-election if a general election is pending.
New South Wales A casual vacancy is filled through a by-election.
Victoria The speaker of the Legislative Assembly or the President of the Legislative Council (as appropriate) must issue the writ for the by-election within one month of the occurrence of the vacancy. The by-election lapses if a State election is called during the by-election period.
Queensland A casual vacancy is filled through a by-election.
Western Australia

A writ for a by-election is to be issued within 40 days of a casual vacancy occurring. However, if the vacancy occurs within 4 months of the next annual periodic elections

  • a by election is to be held concurrent with those elections; or
  • if the periodic election for that division is due, a by election is not required
South Australia A by-election is held to fill a casual vacancy caused by the death, resignation or disqualification of a member or when an election to fill a vacancy is declared void by the Court of Disputed Returns. The Speaker of the House of Assembly must issue the writ for a by-election.
Tasmania

A writ for a by-election is to be issued within 40 days of a casual vacancy occurring. However, if the vacancy occurs within 4 months of the next annual periodic elections

  • a by election is to be held concurrent with those elections; or
  • if the periodic election for that division is due, a by election is not required.
Northern Territory A casual vacancy is filled through a by-election where the vacancy occurs less than 3 years and 6 months, after the first meeting of the Assembly following the last preceding general election.

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