Constitutional change & referendums

The Australian Constitution can only be formally changed through a referendum — a national vote requiring a 'double majority': an overall majority of voters across the country, AND a majority of voters in a majority of states (at least four of the six states). This deliberately high bar reflects the Constitution's role as the foundational legal document underpinning the whole system of government, requiring genuinely broad, cross-regional support before it can be altered. Of the 44 referendums put to Australian voters since Federation, only 8 have succeeded — reflecting how genuinely difficult it is to achieve the double majority required, even when a proposal has significant public and political support.

Key terms

Referendum:

A national vote required to formally change the Australian Constitution.

Double majority:

The requirement that a referendum needs both a national majority and a majority of states to succeed.

Questions

1. 1. The Australian Constitution can only be formally changed through:

   • A referendum
   • A simple vote in parliament alone
   • A decision made by the Prime Minister alone
   • No formal process at all

2. 2. A double majority requires:

   • An overall national majority AND a majority of states
   • Only a majority in a single state
   • Only an overall national majority, with no state requirement
   • No majority of any kind

3. 3. A majority of states means at least:

   • Four of the six states
   • All six states with no exception
   • Only one single state
   • Two of the six states

4. 4. Since Federation, how many of the 44 referendums put to Australian voters have succeeded?

   • 8
   • 44
   • 0
   • 22

5. 5. The 1967 referendum addressed:

   • Discriminatory references to Aboriginal people in the Constitution
   • Changing the national flag
   • Introducing a new currency
   • A matter unrelated to the Constitution

6. 6. The high bar for passing a referendum reflects:

   • The Constitution's role as the foundational legal document
   • An arbitrary rule with no underlying purpose
   • A recent change with no historical basis
   • Something unrelated to the importance of the Constitution

7. 7. The 1967 referendum passed with:

   • Over 90% of the national vote and a majority in every state
   • Only a narrow, bare majority nationally
   • A majority in only one single state
   • Less than half of the national vote

8. 8. Why might requiring both a national majority AND a majority of states (rather than a national majority alone) make constitutional change deliberately harder to achieve?

   • It ensures a proposal has genuinely broad support across different regions of the country, not just concentrated support in one or two highly populated states
   • This dual requirement makes constitutional change exactly as easy to achieve as requiring only a national majority
   • The state-based majority requirement has no real bearing on how broadly supported a proposal needs to be
   • Requiring a majority of states provides no genuine additional safeguard beyond a simple national majority

9. 9. Why might a proposal have strong public support nationally but still fail a referendum due to the double majority requirement?

   • If support for the proposal is concentrated in a few populous states, it might not achieve a majority in enough separate states even while winning the overall national vote
   • A referendum can never actually fail if it achieves genuine majority support at the national level overall
   • The double majority requirement never actually prevents a nationally popular proposal from succeeding
   • National support and state-by-state support are always exactly identical in any Australian referendum

10. 10. Why might the historically low success rate of Australian referendums (8 out of 44) reflect the genuinely high bar set by the double majority requirement, rather than simply weak proposals?

    • Even well-supported or well-intentioned proposals can struggle to achieve broad, cross-regional consensus, showing how demanding the constitutional change process genuinely is by design
    • A low referendum success rate always indicates that every failed proposal must have been poorly designed or lacked genuine merit
    • The success rate of referendums has no connection whatsoever to how difficult the double majority requirement actually is to meet
    • Referendums in Australia have actually succeeded far more often than they have failed throughout the country's history

11. 11. Why might bipartisan political support (both major parties backing a referendum) often be considered important for a referendum's chances of success?

    • Cross-party support can reduce the proposal becoming a point of partisan division, making it more likely voters across the political spectrum will support it
    • Bipartisan political support has no genuine bearing on how successful a referendum is likely to be
    • A referendum with support from only one political party is always exactly as likely to succeed as one with bipartisan backing
    • Political parties never actually play any meaningful role in how Australians vote in a referendum

12. 12. Why might the wording of a referendum question itself significantly influence how voters respond, beyond the substance of the proposed change?

    • Complex, unclear or ambiguous wording can create confusion or uncertainty, which often leads voters toward a cautious "no" vote when they don't fully understand what they are being asked to decide
    • The specific wording used in a referendum question never actually has any influence on how voters ultimately respond
    • Voters always fully understand and respond only to the substance of a proposed change, regardless of how the question is worded
    • Referendum question wording is always identically clear and straightforward regardless of the complexity of the proposed change

13. 13. Why might state governments have significant influence over whether a referendum succeeds, even though a referendum is technically a national vote?

    • Because the double majority requires a majority in a majority of states, state-level campaigning, media coverage and even a state government's own public position can meaningfully sway whether that state's majority is reached
    • State governments have no genuine influence whatsoever over how their state's voters respond to a national referendum
    • The double majority requirement means state governments are actually irrelevant to a referendum's national outcome
    • A referendum is decided purely by the national vote, making any state-level factor completely irrelevant to its result

14. 14. Why might a proposal that has already failed once as a referendum be difficult for a government to bring back to a vote again soon afterward?

    • A failed referendum can create a perception the public has already rejected the idea, making it politically risky to spend further capital on a fresh attempt without a genuine shift in circumstances or public opinion
    • A referendum can never be brought back for a second vote under any circumstances once it has failed
    • Failed referendums have no genuine bearing on the political risk involved in attempting a similar proposal again
    • Governments always immediately re-attempt any failed referendum with no political risk involved whatsoever

15. 15. Why might the deliberately high bar for constitutional change reflect a tension between stability and the ability to adapt the Constitution over time?

    • A high bar protects the Constitution from being changed too easily or frequently, but also means genuinely needed reforms can be very difficult to achieve, even with substantial public support
    • There is no genuine tension between constitutional stability and the ability to adapt the Constitution, since these two goals are always perfectly aligned
    • A high bar for constitutional change always makes it equally easy to achieve necessary reforms as it would be with a lower bar
    • Constitutional stability and adaptability have no meaningful connection to the requirements set for passing a referendum

16. 16. Why might comparing successful referendums (like 1967) with unsuccessful ones reveal patterns about what factors tend to influence referendum outcomes?

    • Examining factors like bipartisan support, question clarity and public education campaigns across both successful and failed referendums can reveal what genuinely tends to matter for achieving the double majority
    • Comparing successful and unsuccessful referendums never actually reveals any meaningful pattern about what influences their outcomes
    • Every Australian referendum has succeeded or failed for entirely random, unrelated reasons with no discernible pattern
    • Referendum success or failure is always determined by a single isolated factor, with no other considerations genuinely relevant

17. 17. Why might public education and awareness campaigns before a referendum vote be considered important for a well-functioning constitutional change process, beyond just campaigning for a "yes" or "no" outcome?

    • Ensuring voters genuinely understand what they are voting on (not just persuading them toward one outcome) supports a more informed, legitimate democratic decision on a fundamental constitutional question
    • Public education about a referendum proposal has no genuine connection to whether the resulting democratic decision can be considered legitimate or informed
    • The only meaningful goal of any pre-referendum campaign is persuading voters toward a specific "yes" or "no" outcome
    • Voters in a referendum always already have complete, accurate understanding of what they are being asked to decide, regardless of any public education efforts

18. 18. Why might a referendum proposing to shift power from the states to the Commonwealth face particular difficulty meeting the double majority requirement, compared to a proposal with no effect on the federal balance?

    • State governments and voters may be more cautious about a change perceived as reducing state authority, making it harder to secure a majority in enough individual states even if the national vote is more favourable
    • Proposals shifting power between the Commonwealth and the states always face exactly the same level of difficulty as any other type of referendum proposal
    • The federal balance of power has no genuine bearing on how voters or state governments respond to a referendum proposal
    • Referendums affecting the Commonwealth-state power balance are always guaranteed to pass regardless of any other factor

19. 19. Why might the "no case" in a referendum campaign often have a structural advantage, given that voters tend to be cautious when uncertain about a proposed constitutional change?

    • Since a "no" vote preserves the status quo while a "yes" vote requires voters to accept a genuine change they may not fully understand, uncertainty or a lack of clear information tends to push undecided voters toward voting "no"
    • The "no case" in a referendum campaign never actually holds any structural advantage over the "yes case" under any circumstances
    • Voters facing genuine uncertainty about a proposed change are always equally likely to vote "yes" as they are to vote "no"
    • The status quo has no genuine bearing on how undecided voters tend to respond to a referendum proposal

20. 20. Why might Australia's comparatively low referendum success rate be cited by some as evidence the Constitution is now overly difficult to update, while others argue it shows the process is working exactly as intended?

    • Whether a demanding threshold for change is seen as a flaw or a feature depends on how much weight is placed on protecting the Constitution from short-term shifts in opinion versus enabling it to keep pace with a changing country
    • There is only ever one single, universally agreed interpretation of what a low referendum success rate actually demonstrates
    • The demandingness of the referendum process has no genuine connection to debates about whether the Constitution can adapt to a changing country
    • Every commentator and constitutional expert always agrees completely on whether Australia's referendum process is working as intended

21. 21. Understanding constitutional change and referendums mainly helps you to:

    • Explain the deliberately demanding double majority process required to formally change Australia's Constitution
    • Assume Australian referendums succeed as often as they fail throughout history
    • Ignore how the wording of a referendum question can influence voter response
    • Treat national and state-level support in a referendum as always being exactly identical