
The Arizona Constitution outlines three methods for amending the state constitution: a citizen-initiated process, a legislative process, and a state constitutional convention. While state constitutions are amended more frequently than the federal constitution, Arizona has proposed a ballot measure that would make it harder to amend its state constitution by requiring a signature distribution requirement for citizen-initiated constitutional amendments. This would mean that citizens would need to collect signatures from each legislative district, rather than on a statewide basis, making it more challenging for citizens to propose constitutional changes.
| Characteristics | Values |
|---|---|
| Number of methods to amend the constitution | 3 |
| Citizen-initiated process | 15% of votes cast in the previous gubernatorial election |
| Legislative process | 31 votes in the Arizona House of Representatives and 16 votes in the Arizona State Senate |
| State constitutional convention | Approved by the electorate in a statewide vote |
| Ballot measures to approve taxes | 60% vote |
| Number of signatures required for an initiated constitutional amendment | 15% of votes cast for governor in the most recent gubernatorial election |
| Time for which petitions can be circulated | 24 months |
| Time by which signatures must be submitted before the election | 4 months |
| Number of states imposing geographic requirements | 17 |
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What You'll Learn
- Arizona's constitution outlines a citizen-initiated amendment process
- Arizona requires a simple majority to approve constitutional amendments
- Amendments require a 60% vote to pass ballot measures to approve taxes
- Arizona's legislature can refer amendments to the ballot for voters to decide
- Arizona's constitution grants citizens the power to initiate amendments

Arizona's constitution outlines a citizen-initiated amendment process
The citizen-initiated amendment process, also known as the initiative process, allows voters to propose laws or constitutional amendments. In Arizona, citizens are required to collect signatures equal to 15% of the votes cast in the previous gubernatorial election to place a proposed constitutional amendment on the ballot. This is the highest bar set by any state, with the average being 10%. Petitions can be circulated for up to 24 months, and signatures must be submitted four months before the election. Arizona is one of 18 states that allow citizen-initiated amendments, and these account for fewer than 2 out of every 10 amendments adopted across the country each year.
Arizona's constitution also allows for a referendum, where the legislature or 5% of qualified electors may order the submission of any measure or item enacted by the legislature to the people at the polls. This is distinct from the initiative process, where citizens propose laws or amendments directly.
While Arizona's constitution provides for citizen-initiated amendments, there have been efforts to make this process more difficult. A ballot measure in the 2024 election proposed a signature distribution requirement, which would require signatures to be gathered from each legislative district rather than on a statewide basis. This would make it harder for amendments to get on the ballot, and it has been characterised as a partisan battle for control of the state.
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Arizona requires a simple majority to approve constitutional amendments
Arizona's constitution is much easier to modify than the federal constitution, and the state offers three methods for amending it: a citizen-initiated process, a legislative process, and a state constitutional convention.
Arizona requires a simple majority for voter approval of constitutional amendments. This means that a simple majority vote is required during one legislative session for the Arizona State Legislature to place a constitutional amendment on the ballot. This amounts to a minimum of 31 votes in the Arizona House of Representatives and 16 votes in the Arizona State Senate. Amendments do not require the governor's signature to be referred to the ballot.
Citizens also have the power to initiate constitutional amendments in Arizona. An initiated constitutional amendment is a citizen-initiated ballot measure that amends a state's constitution. Arizona is one of 18 states that allow this method of amendment. The number of signatures required for an initiated constitutional amendment for the ballot is equal to 15% of the votes cast for governor in the most recent gubernatorial election. Petitions can be circulated for up to 24 months, and signatures must be submitted four months before the election.
Arizona's constitution has been amended several times since its statehood in 1912. The most recent amendment was approved on November 5, 2024.
While state constitutions are generally easier to amend than the federal constitution, some states have made it more challenging for citizens to amend their constitutions. Arizona is one such state, with a ballot measure in 2024 that made it harder to amend the state constitution by imposing a geographic requirement for voter-initiated amendments.
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Amendments require a 60% vote to pass ballot measures to approve taxes
Arizona's constitution outlines three methods for amending the state constitution: a citizen-initiated process, a legislative process, and a state constitutional convention. In Arizona, citizens have the power to initiate constitutional amendments. This is done through a citizen-initiated ballot measure that amends the state's constitution. This is also known as a voter-initiated amendment, and it is permitted in fewer than half of the states. Arizona is one of eighteen states that allow citizens to initiate constitutional amendments.
The number of signatures required for an initiated constitutional amendment for the ballot is equal to 15% of the votes cast for governor in the most recent gubernatorial election. Petitions can be circulated for up to 24 months, and signatures must be submitted four months before the election. This is a high bar, as Arizona and Oklahoma are tied for the highest signature requirement.
Arizona also requires a 60% vote to pass ballot measures to approve taxes. This is an example of a procedural change to the amendment process that can make it harder for changes to get on the ballot in the first place.
Arizona's constitution grants the people the power to propose laws and amendments to the constitution and to enact or reject them at the polls, independently of the legislature. This is an example of direct democracy, where citizens have more direct input into the political process. This is in contrast to representative democracy, where citizens elect representatives to make laws on their behalf. Direct democracy can be seen as a way to increase citizen participation and ensure that laws are more reflective of the people's will. However, it can also be criticised for potentially leading to demagoguery or the tyranny of the majority.
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Arizona's legislature can refer amendments to the ballot for voters to decide
Arizona's constitution provides for three methods of amendment: a citizen-initiated process, a legislative process, and a state constitutional convention. The legislative process allows Arizona's legislature to refer amendments to the ballot for voters to decide.
The legislative process is one of the ways in which Arizona's constitution can be amended. According to Article XVI, the state legislature can refer constitutional amendments to the ballot for voters to decide. A simple majority vote is required during one legislative session for the Arizona State Legislature to place a constitutional amendment on the ballot. That amounts to a minimum of 31 votes in the Arizona House of Representatives and 16 votes in the Arizona State Senate, assuming no vacancies. Amendments do not require the governor's signature to be referred to the ballot.
The citizen-initiated process is another method of amending Arizona's constitution. Citizens have the power to initiate constitutional amendments in Arizona. An initiated constitutional amendment is a citizen-initiated ballot measure that amends a state's constitution. In Arizona, the number of signatures required for an initiated constitutional amendment for the ballot is equal to 15% of the votes cast for governor in the most recent gubernatorial election. Petitions can be circulated for up to 24 months. Signatures must be submitted four months before the election at which the measure is to appear. These signatures may come from anywhere in the state. However, a proposed amendment to the state constitution would establish a signature distribution requirement for citizen-initiated constitutional amendments. If voters approve the measure, it will be the 17th state to impose a geographic requirement to the process of introducing voter-initiated constitutional amendments.
The third method of amending Arizona's constitution is through a state constitutional convention. According to Section 2 of Article XXI of the Arizona Constitution, the state legislature can only call for a convention if it is approved by the electorate in a statewide vote.
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Arizona's constitution grants citizens the power to initiate amendments
Arizona's constitution outlines the initiative process through which voters may propose laws or constitutional amendments. The state requires citizens to collect a number of signatures equal to 15% of the votes cast in the previous gubernatorial election to place a proposed constitutional amendment on the ballot. Petitions can be circulated for up to 24 months, and signatures must be submitted four months before the election.
The Arizona Constitution provides for three methods of amending the Arizona Constitution: a citizen-initiated process, a legislative process, and a state constitutional convention. The legislative process involves the state legislature referring constitutional amendments to the ballot for voters to decide. A simple majority is required for voter approval.
The state constitutional convention method of amending the constitution involves the state legislature calling for a convention, which must be approved by the electorate in a statewide vote. Any amendments, revisions, or proposals of the Constitution require a simple majority vote by the electorate.
While Arizona's constitution grants citizens the power to initiate amendments, there have been efforts to make this process more difficult. In the 2024 election, voters in Arizona considered a measure to amend the state constitution to establish a signature distribution requirement for citizen-initiated constitutional amendments. This would require citizens to reach the signature threshold in every legislative district rather than on a statewide basis. Such geographic distribution requirements have been increasingly politicized, with state legislators altering the initiative and referendum process for partisan gains.
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Frequently asked questions
The Arizona Constitution provides for three methods of amending the Arizona Constitution—a citizen-initiated process, a legislative process, and a state constitutional convention.
In Arizona, citizens have the power to initiate constitutional amendments. An initiated constitutional amendment is a citizen-initiated ballot measure that amends a state's constitution. Citizens need to collect signatures equal to 15% of the votes cast in the previous gubernatorial election to place a proposed constitutional amendment on the ballot.
The state Legislature can refer constitutional amendments to the ballot for voters to decide. A simple majority vote is required during one legislative session for the Arizona State Legislature to place a constitutional amendment on the ballot. That amounts to a minimum of 31 votes in the Arizona House of Representatives and 16 votes in the Arizona State Senate.
A state constitutional convention is a gathering that is held to create, replace, revise, or adopt piecemeal amendments to existing constitutions. The state legislature can only call for a convention if it is approved by the electorate in a statewide vote.

























