The Labor and Liberal parties will test-drive their federal election campaign themes in a Super Saturday of by-elections on July 28.
Parliamentary Speaker Tony Smith issued the writs on Friday for by-elections to be held in the seats of Perth and Fremantle (WA), Braddon (Tasmania), Mayo (SA) and Longman (Queensland).
It's the first time so many federal by-elections have been held on the one day.
Electoral rolls in the five seats will close on June 22.
Nominations will close on July 5 with the declaration of nominations a day later.
Four of the by-elections were triggered by MPs facing dual citizenship questions, while Labor's Tim Hammond retired in the seat of Perth for family reasons.
Former Nick Xenophon Team representative Rebekha Sharkie will recontest her seat of Mayo for the Centre Alliance, but faces a tough challenge from the Liberals' Georgina Downer, the daughter of former Howard government minister Alexander Downer.
Labor won't face Liberal contestants in Perth and Fremantle.
However, the Liberals are in with a shot to unseat Susan Lamb in Longman and Justine Keay in Braddon.
Labor has been campaigning heavily on its alternative personal income tax cuts plan, higher spending on health and education, a better deal for pensioners and stemming the impact of penalty rate cuts.
Australian Associated Press
