Poll-weary West Australians should seize the fresh Senate election as a rare opportunity to give feedback to the newly elected federal government, the opposition says.
The High Court declared the result of WA's Senate election void on Thursday in the wake of the Australian Electoral Commission's lost votes debacle.
The new election will be the fourth for WA voters since the state poll in March last year.
Federal member for Perth Alannah MacTiernan said voters would be able to show the Abbott government how they felt about its approach to issues including Medicare and Commonwealth infrastructure spending in the state.
"A lot of people out there will say `oh my God, not another election'," Ms MacTiernan told reporters.
"There will be a bit of election fatigue in the community but it's a great opportunity.
"Very rarely do you have an opportunity to send a message to a government so soon after an election.
"Mr Abbott promised no surprises but I think we've seen plenty of surprises."
Alongside her was Labor colleague Louise Pratt, who says she's confident of winning a Senate seat as she had the first time around, despite the party placing her behind union czar Joe Bullock on the senate ticket.
"I have every confidence that it's the same result we will get this time," Ms Pratt said.
The Australian Sports Party's Wayne Dropulich, who won a seat in the recount, said he was disappointed a fresh election would be called.
"It's also disappointing for all West Australian taxpayers, who obviously have to foot the bill for this election," he said.
Mr Dropulich said increased media exposure of the party in the past five-and-a-half months had boosted its chances.
"We'll do better than we did last time. We expect our primary vote to increase."
He said the party would roll out policies in coming weeks - with some potentially not related to sport.
"You'll have to wait and see. They will be coming in due course."
Greens Senator Scott Ludlam, who also scraped over the line at the recount, warned WA voters to pay close attention to preferencing.
Preferencing helped micro-parties including the Australian Sports Party over the line at the last two polls.