An Australian Constitution referendum is one of the rarest events in our democracy, and that is by design. Changing the rulebook that everything else in government runs on is meant to be difficult, and the stakes involved explain exactly why.
This article looks at why amending a constitution is treated so seriously around the world, how Australia’s own process works, and why so few attempts to change it actually succeed. No legal background needed, just a clear explanation of one of the toughest processes in Australian law, and why it has stayed that way for well over a century.
Why Constitutions Are Deliberately Hard to Change
A constitution is meant to be the foundation everything else is built on, including ordinary laws, government structures, and individual rights. If it could be changed as easily as a regular piece of legislation, that foundation would not mean very much.
Stability Versus Flexibility
Every country with a written constitution faces the same basic tension. Make it too easy to change, and it stops protecting anyone from the political mood of the day. Make it too hard to change, and it risks becoming frozen in time, unable to reflect modern values or circumstances.
Australia leans firmly toward the difficult end of that scale. According to research comparing constitutions worldwide, Australia’s amendment process ranks among the hardest in the world to successfully use, sitting alongside countries that deliberately built extremely high barriers into their founding documents.
This was a conscious choice by the people who drafted the Constitution in the 1890s. They wanted a document that could evolve over time, but only with genuine and widespread agreement, rather than at the whim of whichever party happened to control Parliament at a given moment.
What Makes an Amendment Process Difficult
Constitutional amendment processes around the world commonly include some combination of:
- Requiring a vote of the people, rather than just parliament
- Demanding a high majority rather than a simple fifty percent threshold
- Requiring approval across multiple regions or states, not just nationally
- Building in waiting periods before a proposal can be put to a vote
How an Australian Constitution Referendum Actually Works
Australia’s process for changing its Constitution is set out in a single section, section 128, and it is famous among legal scholars for just how demanding it is.
Getting a Proposal to a Vote
Before the public ever sees a referendum question, the proposed change must first pass both houses of the federal Parliament by an absolute majority. The Parliamentary Education Office explains that the referendum itself must then be held between two and six months after the bill passes.
If the two houses cannot agree, section 128 still allows a path forward. Records held by the National Archives of Australia show that the Governor-General can submit a proposal to the people even when one house has rejected it twice, provided certain conditions are met, ensuring deadlock alone cannot permanently block the people from having their say.
The Double Majority Requirement
This is where things get genuinely tough. According to the Australian Electoral Commission, a referendum only succeeds if it achieves a double majority, meaning more than half of all voters nationally say yes, and a majority of voters in at least four of the six states also say yes.
This double layer of approval protects smaller states from having their votes overridden purely by population size. It also means a proposal can attract strong national support and still fail if it does not connect with voters in enough individual states.
Compulsory Voting Makes the Stakes Even Higher
Unlike many other countries, voting in an Australian referendum is compulsory for enrolled citizens. This means the result genuinely reflects the views of nearly the entire eligible population, rather than just the people motivated enough to turn up.
This high turnout adds real weight to every referendum outcome. A result is far harder to dismiss as unrepresentative when almost every eligible voter in the country has had their say, compared to systems where turnout can sometimes dip well below half.
Why So Few Referendums Succeed
Since Federation, only eight out of forty four proposed changes to the Constitution have actually succeeded. The full text of the Constitution, including section 128, is publicly available through the Federal Register of Legislation, and that remarkably low success rate tells you a lot about how cautious Australians tend to be about altering their founding document.
Australians Are Wary of Expanding Federal Power
Historically, proposals that would have increased the power of the federal government over the states have struggled the most. Voters appear far more comfortable rejecting change than handing over additional authority to Canberra, a pattern that has held steady across decades of attempted reform. General information about how federal and state powers are divided is available through australia.gov.au, which explains the basic structure of government that many of these failed proposals sought to adjust.
The 1967 Referendum Remains the Gold Standard
The most successful referendum in Australian history removed discriminatory references to Aboriginal and Torres Strait Islander people from the Constitution, passing with overwhelming support across the entire country. It remains a clear example of what broad, genuine consensus can achieve.
What set that referendum apart was the sheer breadth of agreement behind it. Support came from across the political spectrum, with very little organised opposition, which meant the campaign was less about persuading a divided public and more about confirming a decision most Australians had already made up their minds about.
A Recent Example of the High Stakes Involved
More recently, the 2023 referendum on an Aboriginal and Torres Strait Islander Voice to Parliament did not achieve the required double majority and was therefore unsuccessful. Whatever someone’s personal view on that particular proposal, the result illustrated just how high the bar truly is, and how much sustained, widespread agreement a change really needs to clear it.
Conclusion
Amending a constitution is never meant to be simple, and an Australian Constitution referendum is a clear demonstration of just how high that bar is set. The double majority requirement, compulsory voting, and decades of mostly unsuccessful attempts all point to the same underlying idea, that the nation’s founding rules should only change with genuine, widespread agreement.
Understanding this process helps make sense of why constitutional change in Australia is so rare and so closely watched whenever it happens. For more breakdowns of how Australian law actually works, lawyer.com.au has a growing library of articles worth exploring, and a qualified legal professional can help if you need advice tailored to a specific situation.
FAQs
1. What is needed to pass an Australian Constitution referendum?
A referendum needs to achieve a double majority. This means more than half of all voters across the country must vote yes, and a majority of voters in at least four of the six states must also vote yes.
2. How many Australian referendums have actually succeeded?
Only eight out of forty-four proposed changes have succeeded since Federation. This makes Australia’s Constitution one of the hardest in the world to formally amend.
3. Is voting compulsory in an Australian referendum?
Yes. Voting in a federal referendum is compulsory for enrolled Australian citizens aged eighteen and over, in the same way that voting in a federal election is compulsory.
4. What section of the Constitution explains how to change it?
Section 128 sets out the entire process for amending the Australian Constitution, including how a proposal reaches Parliament and the double majority needed for it to succeed at a referendum.
5. Why do most constitutional referendums in Australia fail?
The double majority requirement makes success genuinely difficult, and Australians have historically been cautious about proposals that expand federal government power. Most successful changes have addressed clear, widely understood problems rather than broader or more contested reforms.