What You Need To Know About Double Dissolution Elections

What You Need To Know About Double Dissolution Elections

Prime Minister Malcolm Turnbull on Monday laid down an ultimatum to the Senate: pass the government’s industrial relations legislation or face a double-dissolution election. Adelaide Law School lecturer Adam Webster explains how double-dissolution elections work and why Australia might soon be having one.

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The Senate will sit from April 18 to consider two bills that would reinstate the Australian Building and Construction Commission (ABCC), and the Registered Organisations bill, which would establish a body to provide greater investigatory and information-gathering powers over unions.

Turnbull also announced the budget will be handed down a week early, on May 3. This move clears the way for a double-dissolution election.

So, what is a double-dissolution election? How does it differ from an ordinary election? And why is timing so important?

What’s the difference?

In an ordinary election, all seats in the House of Representatives – but only half the seats in the Senate – are up for grabs.

Senators are elected for a six-year term. Half are up for re-election every three years.

But, in a double-dissolution election, there is a full, rather than the usual half, Senate election. All 76 Senate seats are vacated.

What is a double-dissolution election?

Section 57 of the Constitution sets out a mechanism for resolving disputes between the two houses of parliament that arise when the government cannot get its legislation through the Senate.

If a bill has passed the House of Representatives but the Senate either fails to pass or rejects it on two occasions – with a period of at least three months between each attempt – the government can request the governor-general dissolve both houses of parliament and a double-dissolution election be held.

A bill failing to pass or being rejected twice by the Senate is sometimes said to be a “trigger” for a double-dissolution election.

After a double-dissolution election, if the same bill is again rejected by the Senate, the government can ask the governor-general to convene a joint sitting of the House of Representatives and the Senate. Because the government will usually have a majority in the lower house – and there are twice as many lower house MPs as there are senators – a joint sitting is more likely to pass the legislation.

While the Constitution provides a procedure for resolving these deadlocks, there is no requirement for the government to put the proposed trigger legislation before the new parliament.

There is some suggestion that if the government proceeds to a double-dissolution election, the new Senate electoral system might return the government a Senate majority. If that were the case, a joint sitting of both houses would be unnecessary – the government could expect that its legislation would pass both houses.

However, there is a further complication in a double-dissolution election. Double the number of Senate seats up for grabs also means the “quota” of votes required for a Senate seat is reduced. This makes it easier for minor players to win a seat.

Why the rush?

The government already has two bills that have twice been rejected by the Senate and would provide triggers for a double-dissolution election: the abolition of the Clean Energy Finance Corporation, and the Registered Organisations bill.

The Registered Organisations bill is set to be put before the Senate for a third time. However, on this occasion, the Senate has forewarning that if it blocks the bill again, the government will call a double dissolution.

If the Senate was to pass the ABCC bills and the Registered Organisations bill, the government could technically still trigger a double-dissolution election using the Clean Energy Finance Corporation bill.

The timeline for a double dissolution is rather tight. This is because Section 57 requires a double-dissolution election cannot take place in the final six months prior to:

… the date of expiry of the House of Representatives by effluxion of time.

This means that, as the House of Representatives first sat after the last election on November 12, 2013, the house’s three-year term expires on November 11, 2016. The last day on which a double-dissolution election could be called is May 11, 2016.

The budget has thus been moved forward to May 3 to allow the parliament sufficient time to pass it before an election is called and parliament is dissolved.

Why is the Senate coming back in April?

Because of this tight timeline, Turnbull’s first issue was to get senators back to Canberra to consider the proposed legislation. The current session of parliament was not scheduled to sit again until the budget on May 10.

Last week, the Senate passed a resolution that it would not sit again before May 10 without the agreement of a majority of senators. This would have left the Senate with no time to debate and vote on the ABCC bills and the Registered Organisations bill as well as passing the budget.

However, the government has managed to sidestep this problem by asking the governor-general to terminate (or “prorogue”) the current session of parliament and recall the parliament for a new session to sit from April 18, 2016.

By terminating the current session, the government avoids any problems associated with trying to reschedule the current session. While proroguing parliament terminates any business before the parliament, the Senate’s standing orders allow that these matters of business can be reintroduced and the bills before the Senate can be restored.

After many weeks of speculation, the government has laid down the challenge for the Senate and smoothed the path for a double-dissolution election.

Adam Webster, Lecturer, Adelaide Law School

This article was originally published on The Conversation.


  • Okay so, senators are elected for six years, and half the senate seats are up for election every 3 years.

    Assume there is a double dissolution. We elect a full senate. Which senators need to campaign for re-election in three years time, as opposed to six? Or do we only elect half a senate after a double dissolution?

    • Every seat goes back into the hat for re-election. I’m wondering the same thing re: 3 years from now actually, I wasnt paying attention last time it happened.

      As it is, IF it happens (and everythings pointing to it), its a political stunt, nothing more. With a normally timed election only 3 months away for all practical purposes, bringing it forward under the guise of a double dissolution has nothing to do with the failed vote, and everything to do with controlling the senate.

      Turnbull WANTS every seat to get re-elected, knowing that DD’s make it that little bit harder for the micro parties to get in, plus the recently introduced rules on preferences will make it all that much harder. End result being the big parties being back in control, and not needing to deal with the independents, who in the Lib’s eyes had too much power.

  • Do the general public get asked for an opinion on the subjects in the Bill? The Bill that triggered the double dissolution?

    • You voice your opinion by deciding who to vote as your representative in our representative style democracy. Don’t like the way the current person does it? Pick a different person.

  • Thanks for the explanation. So apparently if a sitting government doesn’t get its way, it will always find a way to get its way? Nice.

    • It’s now like taking it to the population. If they get back in then it’s “I told you so”, if they’re kicked out then it’s “ah shit, i guess we were wrong”.
      All that obviously depends on the population being switched on to current affairs and understanding the issues at hand.

        • Normally in a labor voter but at the moment i wouldn’t look at them in a fit.
          Ideally Australians would get over the idea that a minority government is going to spell the end of the country. That is the was to keep the bastards honest.

    • The government is elected to govern. If it can’t do that, then it needs a way to fix it.

  • If the full senate is up for grabs in the election, and each senator is elected for a 6-year term, doesn’t that mean no senate seats will be available in the election that follows? Unless of course a senator resigns or dies. Does it mean some states won’t have a senate election next time?

    • The half with the highest number of votes stay the full 6 year term. The bottom half sit the 3 years. This brings it back in line with the half half system next election.

      • thats only a gentlemans handshake, and with the senate like it currently is, i cant see any of them agreeing to put their hand up in 3 years time

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