Australians will vote in a general election on 18 May, Prime Minister Scott Morrison has announced.
The poll will decide whether the conservative government wins a third term or is replaced by a Labor administration led by Bill Shorten.
All 151 seats in the House of Representatives will be contested, and half of the 76 seats in the Senate.
1. Voting in the election is compulsory
Unlike many other global democracies, Australia has mandatory voting for people aged 18 and over – or they risk a fine.
It ensures a high turnout: 95% of people voted in Australia’s last election. The most recent US and UK elections, by contrast, drew an estimated 55% and 66% respectively.
2. Leadership ‘madness’ may haunt the government
Mr Morrison only became prime minister last August after bitter party infighting ousted his predecessor, Malcolm Turnbull.
In doing so, Mr Morrison became Australia’s fifth leader since 2013.
“It was a peculiarly Australian form of madness,” Mr Turnbull told the BBC in March, speaking about a coup culture which began with Labor in 2010.
It’s likely to harm the government’s standing with voters, predicts Prof Sally Young, a politics expert from the University of Melbourne.
“They’re sick of the sniping and undermining,” she says. “Knifing a leader – it never goes down well.”
3. Climate change could sway votes – but to what extent?
Australia has just endured a year of extreme weather events, including destructive floods, bushfires, cyclones and a severe drought. The past summer was the nation’s hottest on record.
It has made climate change a key election issue in some seats, experts say.
The University of Sydney’s Prof Marc Stears agrees, but says it’s unclear how it widely it will affect voting decisions.
4. In many ways, the main battle lines are familiar
Prof Stears says the major parties are already talking up their traditional strengths. That’s subjects like jobs and infrastructure for the government, and health and education for Labor.
They will compete fiercely on economic issues, with both parties promising policies aimed at reducing the cost of living,
5. There’s much talk about a north-south divide
Mr Morrison is overseeing a minority government, meaning he can ill afford to lose support anywhere in the country.
Political observers say he faces challenges from the left and right – a debate that is often framed in geographical terms.
In the northern state of Queensland, experts say the government fears losing votes to more socially conservative minor parties and independents.
But in Victoria in the south, the electorate is perceived as more progressive. It delivered a resounding victory to Labor in a state election five months ago.
6. Will migration and refugee debates resurface?
During past elections, Australia’s major parties have employed tough rhetoric on immigration issues – particularly regarding asylum seekers.
It has often been used to appear strong on issues such as national security, says Prof Stears.
7. There are signs of support for minor parties
Prof Young says there is some public cynicism about the major parties, pointing to possible increases in support for other candidates.
High-profile independent candidates have entered key races, and in New South Wales, a recent state election saw rises in minor party support in rural electorates.
8. Is there a risk of foreign interference?
In February, Mr Morrison said a “state actor” had carried out a cyber attack on the parliament and political parties.
Authorities said there was no evidence of electoral interference, but security experts have urged vigilance.
Concerns about alleged foreign interference prompted Australia to introduce new laws last year.
9. Citizenship checks should be water-tight
In 2017, several MPs were disqualified for unintentionally breaking a rule that lawmakers cannot be dual citizens when elected.
Fifteen parliamentarians were ousted, though six later managed to return after relinquishing their non-Australian citizenships.
10. What do the opinion polls say?
Opinion polls in recent times have consistently put Labor in front on a two-party preferred basis.
However, those measures also say that Mr Morrison leads Mr Shorten as preferred prime minister.