Initiative and referendum process ballot measures
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Voters have decided oninitiative and referendum process ballot measures across the U.S. As a state ballot measure topic, this includes measures regarding the initiative and referendum process, such as signature requirements, deadlines, and other requirements. The topic is grouped within theelection policy area.
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Upcoming ballot measures
- See also:2026 ballot measures and2027 ballot measures
The following is a list of state ballot measures related to this topic that are certified or potential for this year and future elections:
2026
- Arkansas Create a Fundamental Right to Initiative and Referendum Amendment (2026) - Potential
- Arkansas Initiative and Referendum Process Amendment (2026) - Potential
- California Allow Voting on Citizen Initiatives at Primary Elections Measure (2026) - Potential
- California Authorize Citizen-Initiated Constitutional Revisions Amendment (2026) - Potential
- California Changes to Initiative Process and Requirements Initiative (2026) - Potential
- California Vote Requirements for Initiatives Requiring Supermajority Votes Amendment (2026) - On the ballot
- Idaho HJR 4, Grant Legislature Exclusive Authority and Prohibit Citizen-Initiated Measures on Marijuana, Narcotics, and Psychoactive Substances Amendment (2026) - On the ballot
- Missouri Amendment 4, Require Congressional District Approval for Initiated Constitutional Amendments, Prohibit Foreign Contributions, and Penalize Petition Fraud Amendment (2026) - On the ballot
- Missouri Electronic Signatures for Citizen Initiatives Measure (2026) - Potential
- Missouri Initiative Process, Foreign Campaign Funds, and Prohibition of Certain Activities by Legislators Amendment (2026) - Potential
- Nebraska Require a Four-Fifths Vote for Legislative Ballot Initiative Changes Amendment (2026) - Potential
- North Dakota 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot
- North Dakota Single-Subject Requirement for Constitutional Amendments Measure (June 2026) - On the ballot
- South Dakota Constitutional Amendment L, 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot
- South Dakota Require Three-Fourths Legislative Vote and Voter Approval to Amend Initiated Laws Initiative (2026) - Potential
- South Dakota Require Voter Approval for Legislative Changes to Initiative and Referendum Process Amendment (2026) - Potential
- Utah 60% Vote Requirement for Ballot Initiatives to Increase or Expand Taxes Amendment (2026) - On the ballot
List of state ballot measures
Click the tabs to view state ballot measures related to this topic, organized by year or state.
Years
States
2026
- Arkansas Create a Fundamental Right to Initiative and Referendum Amendment (2026) - Potential
- Arkansas Initiative and Referendum Process Amendment (2026) - Potential
- California Allow Voting on Citizen Initiatives at Primary Elections Measure (2026) - Potential
- California Authorize Citizen-Initiated Constitutional Revisions Amendment (2026) - Potential
- California Changes to Initiative Process and Requirements Initiative (2026) - Potential
- California Vote Requirements for Initiatives Requiring Supermajority Votes Amendment (2026) - On the ballot
- Idaho HJR 4, Grant Legislature Exclusive Authority and Prohibit Citizen-Initiated Measures on Marijuana, Narcotics, and Psychoactive Substances Amendment (2026) - On the ballot
- Missouri Amendment 4, Require Congressional District Approval for Initiated Constitutional Amendments, Prohibit Foreign Contributions, and Penalize Petition Fraud Amendment (2026) - On the ballot
- Missouri Electronic Signatures for Citizen Initiatives Measure (2026) - Potential
- Missouri Initiative Process, Foreign Campaign Funds, and Prohibition of Certain Activities by Legislators Amendment (2026) - Potential
- Nebraska Require a Four-Fifths Vote for Legislative Ballot Initiative Changes Amendment (2026) - Potential
- North Dakota 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot
- North Dakota Single-Subject Requirement for Constitutional Amendments Measure (June 2026) - On the ballot
- South Dakota Constitutional Amendment L, 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot
- South Dakota Require Three-Fourths Legislative Vote and Voter Approval to Amend Initiated Laws Initiative (2026) - Potential
- South Dakota Require Voter Approval for Legislative Changes to Initiative and Referendum Process Amendment (2026) - Potential
- Utah 60% Vote Requirement for Ballot Initiatives to Increase or Expand Taxes Amendment (2026) - On the ballot
2024
- Arizona Proposition 134, Signature Distribution Requirement for Initiatives Amendment (2024)

- Arizona Proposition 136, Legal Challenges to Constitutionality of Initiatives Amendment (2024)

- Colorado Amendment K, Initiative and Referendum Filing and Judicial Retention Filing Deadlines Amendment (2024)

- North Dakota Constitutional Measure 2, Single-Subject Requirement for Initiatives and Require Constitutional Initiatives to be Passed Twice Amendment (2024)

2023
- Maine Question 5, Change Time Period of Judicial Review of Initiative Petitions Amendment (2023)

- Maine Question 7, Remove Residency Requirement for Initiative Petition Circulators Amendment (2023)

- Ohio Issue 1, 60% Vote Requirement to Approve Constitutional Amendments Measure (2023)

2022
- Arizona Proposition 128, Legislative Changes to Ballot Initiatives with Invalid Provisions Amendment (2022)

- Arizona Proposition 129, Single-Subject Requirement for Ballot Initiatives Amendment (2022)

- Arizona Proposition 132, 60% Vote Requirement for Ballot Measures to Approve Taxes Amendment (2022)

- Arkansas Issue 2, 60% Supermajority Vote Requirement for Constitutional Amendments and Ballot Initiatives Measure (2022)

- Colorado Proposition GG, Include Income Tax Effects in Initiative Ballot Language Measure (2022)

- South Dakota Constitutional Amendment C, 60% Vote Requirement for Ballot Measures Increasing Taxes or Appropriating $10 Million Measure (June 2022)

2020
- Arkansas Issue 3, Initiative Process and Legislative Referral Requirements Amendment (2020)

- Florida Amendment 4, Require Constitutional Amendments to be Passed Twice Initiative (2020)

- Montana C-46, Initiated Amendment Distribution Requirements Measure (2020)

- Montana C-47, Initiated Statute and Referendum Distribution Requirements Amendment (2020)

- North Dakota Constitutional Measure 2, Require Initiated Constitutional Amendments to be Approved by the Legislature or Passed Twice Amendment (2020)

2019
2018
- Florida Amendment 3, Voter Approval of Casino Gambling Initiative (2018)

- South Dakota Constitutional Amendment W, State Campaign Finance and Lobbying Laws, Government Accountability Board, and Initiative Process Amendment (2018)

- South Dakota Constitutional Amendment X, 55% Vote Requirement to Approve Constitutional Amendments Measure (2018)

- South Dakota Constitutional Amendment Z, Single-Subject Rule for Constitutional Amendments (2018)

- South Dakota Initiated Measure 24, Ban Out-of-State Contributions to Ballot Question Committees Initiative (2018)

2016
2015
2014
- Arkansas Ballot Measure Signature Requirements Amendment, Issue 2 (2014)

- North Dakota Initiative Filing Deadline Amendment, Measure 1 (June 2014)

- North Dakota Referral and Initiative Reform Amendment, Measure 4 (2014)

2013
2010
- Arizona Proposition 112, Ballot Initiative Filing Deadline Amendment (2010)

- Oklahoma State Question 750, Initiative and Referendum Signature Requirements Amendment (2010)

2009
2008
- Arizona Proposition 105, Supermajority Requirement for Tax and Spending Initiatives Amendment (2008)

- Colorado Referendum O, Citizens' Initiative Changes Amendment (2008)

- Ohio Issue 1, Ballot Initiative Signature Deadline Amendment (2008)

- Wyoming Constitutional Amendment B, Initiative Signature Distribution Requirement Measure (2008)

2006
- Colorado Amendment 38, Citizens' Initiative and Referendum Process Initiative (2006)

- Florida Amendment 3, 60% Majority Requirement for Constitutional Amendments Amendment (2006)

- Maine Question 2, Change Deadline for Submission of Signatures for Statewide Initiatives Measures (2006)

2004
- Alaska Measure 1, Change Signature Distribution Requirement for Initiatives Amendment (2004)

- Arizona Proposition 101, Require Ballot Initiatives Proposing Spending to Include Provisions on Revenue Generation Amendment (2004)

- Arizona Proposition 104, Extending Initiative Petition Circulation Period and Changing Filing Deadline Amendment (2004)

- Florida Amendment 2, Requirements for Citizens' Initiatives Amendment (2004)

- Nebraska Initiative Measure 417, Authorize Gambling Laws by Initiative Amendment (2004)

- Nebraska Initiative Measure 418, Legislative Supermajority to Modify Initiatives Amendment (2004)

- North Dakota Initiative Measure Fiscal Impact Referendum, Constitutional Measure 2 (2004)

2002
- Florida Amendment 2, Economic Impact Statements for Initiatives Amendment (2002)

- Montana Distribution Requirements for Constitutional Initiatives, C-37 (2002)

- Montana Distribution Requirements for Statutory Initiatives, C-38 (2002)

- Oklahoma State Question 698, Initiative Signature Requirements Amendment (2002)

- Oregon Measure 26, Prohibit Payment Based On Per Signature Gathered Initiative (2002)

2000
- Alaska Measure 1, Prohibit Ballot Initiatives on Hunting Amendment (2000)

- Arizona Proposition 102, Two-Thirds Vote Requirement for Hunting-Related Initiatives Amendment (2000)

- Nebraska Amendment 3A, Require Constitutional Amendments to Pass Twice Measure (2000)

- Nebraska Amendment 3B, Initiative and Referendum Definition Measure (2000)

- Nebraska Amendment 3C, Changes to Initiative Filing Requirements Measure (2000)

- Oregon Measure 78, Lengthened Period for Verifying Petition Signatures Amendment (May 2000)

- Oregon Measure 79, Increase Signature Requirement for Citizen-Initiated Constitutional Amendments Measure (May 2000)

- Oregon Measure 96, Prohibit Legislature from Making Initiative Process Harder Initiative (2000)

- South Dakota Amendment B, Authorize Citizen Initiatives for Local Government Consolidation Measure (2000)

1999
1998
- Arizona Proposition 104, Limits on Legislative Alteration of Voter-Approved Initiatives and Referendums Amendment (1998)

- Arizona Proposition 105, Prohibit Legislative Alteration of Ballot Initiatives Amendment (1998)

- California Proposition 219, Uniform Application of Ballot Measures Amendment (June 1998)

- Mississippi Resident Only Initiative Petition Circulation, Amendment 1 (1998)

- Missouri Amendment 1, Change Signature Deadline for Ballot Initiatives Measure (1998)

- Nebraska Amendment 5A, Single Subject Requirement for Initiatives Measure (May 1998)

- Nebraska Amendment 5B, Single Subject Requirement for Veto Referendums Measure (May 1998)

- Nevada Question 1, Conflicting Voter-Approved Laws Resolution Amendment (1998)

- Oregon Measure 62, Campaign Finance and Signature Gathering Regulation Initiative (1998)

- Oregon Measure 63, Supermajority Vote for Ballot Measures Proposing Supermajority Requirements Initiative (1998)

- Utah Proposition 5, Two-Thirds Vote Requirement for Hunting-Related Initiatives Amendment (1998)

- Wyoming Signature Distribution Requirements, Amendment B (1998)

1996
- Arkansas Legal Changes to Ballot Titles, Proposed Amendment 3 (1996)

- Colorado Amendment 13, Initiative, Referendum, and Petition Process Initiative (1996)

- Maine Question 8, Municipal Certification of Direct Initiative Petitions Amendment (1996)

- Nebraska Initiative Measure 410, Changes to Initiative Signature Requirements Amendment (1996)

- Oregon Measure 24, Requirements for Initiative Petition Signatures Amendment (May 1996)

- Oregon Measure 33, Legislative Limits on Changing Voter Approved Statutes Initiative (1996)

- Oregon Measure 46, Require Majority of Registered Voters to Approve Tax Increase Ballot Measures Initiative (1996)

- Rhode Island Question 8, Initiative Process Advisory Question (1996)

1994
- Colorado Referendum A, Single-Subject Rule for Initiatives Amendment (1994)

- Florida Amendment 4, Initiatives on Raising Government Revenue Initiative (1994)

1992
1990
1988
- Nebraska Amendment 3A, Signature Requirements for Signers of Initiatives Measure (1988)

- Nevada Question 1, Filing Deadlines for Initiatives and Referendums Amendment (1988)

- North Dakota Suspension of Tax Measures Referendum, Measure 1 (1988)

- South Dakota Amendment A, Remove Legislature from Initiative Process Measure (1988)

1986
- Colorado Amendment No. 3, Franchises in Home Rule Municipalities Amendment (1986)

- Florida Amendment 4, Supreme Court Advisory Opinions on Initiatives Amendment (1986)

- Maine Obscene Material Prohibition Initiative (June 1986)

- Maine Question 1, Mandatory Local Measured Phone Service Ban Initiative (1986)

- Oregon Measure 3, Verification of Initiative and Referendum Petition Signatures Amendment (May 1986)

- Rhode Island Question 5, Citizen-Initiated Ballot Measure Process and Nonpartisan Constitutional Convention Candidates Amendment (1986)

- Wyoming Initiative and Referendum, Amendment 1 (1986)
1984
1982
- Maine Question 1, Adjust Individual Income Tax for Inflation Initiative (1982)

- Maryland Alteration of Signature Requirements, Question 5 (1982)

1981
- Maine Proposed Constitutional Amendment No. 1, Initiative Signature Validity and Form of Ballot Question Measure (1981)

- Washington SJR 133, Initiatives to the Legislature Signature Submission and Verification Timeline Amendment (1981)

1980
- California Proposition 4, Elections Regarding Low-Income Housing Amendment (June 1980)

- Colorado Amendment No. 1, Initiative and Referendum Process Amendment (1980)

- Idaho SJR 112, Simple Majority Vote for Citizen Initiatives and Allow Initiatives on General Election Ballots Amendment (1980)

- Maine Proposed Constitutional Amendment No. 2, Ballot Initiative and Veto Referendum Elections Measure (1980)

- Minnesota Amendment 5, Initiative and Referendum Amendment (1980)

- North Dakota Election Law Revision Referendum, Measure 8 (1980)

- South Dakota Amendment C, Prohibit Legislature from Changing Initiated Laws Measure (1980)

- South Dakota Amendment D, Legislative Restrictions to Amend Initiated Laws (1980)

1978
- North Dakota Direct Democracy Referendum, Amendment 3 (1978)

- Ohio Issue 1, Ballot Board to Write Measure Language Amendment (June 1978)

- Oregon Measure 1, Initiative and Referendum Requirements for County Home Rule Amendment (May 1978)

1977
1976
- Maryland Petition Filing Requirements, Question 13 (1976)

- Nevada Question 10, Limits of Initiative Questions Amendment (1976)

- Ohio Issue 7, Initiative and Referendum Signature Requirements Initiative (1976)

- Utah Initiative A, Prohibit Fluoridation of Public Water Without Voter-Approved Initiative Measure (1976)

1975
1974
- Maine Weight of Commercial Vehicles and Related Provisions Referendum (1974)

- Ohio Issue 3, Ohio Ballot Board and Constitutional Amendments Measure (May 1974)

- Oklahoma State Question 495, Simple Majority Vote for Citizen Initiatives Measure (August 1974)

- Oklahoma State Question 496, Simple Majority Vote for Constitutional Amendments Measure (August 1974)

- South Dakota Amendment A, Restructure of Legislative Department Measure (1974)

- South Dakota Amendment B, Voting Rights Expansion Measure (1974)

1972
- Florida Amendment 3, Single Subject Initiatives Amendment (1972)

- Maine Question 1, General Election Ballot Form Initiative (June 1972)

- Nevada Question 5, Require Initiatives Proposing Spending Include Funding Source Amendment (1972)

- North Dakota Direct Democracy Signature Requirements, Alternate Proposition 2 (1972)

- South Dakota Amendment E, Initiated Constitutional Amendment and Constitution Revision Measure (1972)

1970
- California Proposition 16, Constitutional Amendments and Conventions Amendment (1970)

- South Dakota Amendment B, Initiative and Referendum Requirements Measure (1970)

- South Dakota Amendment I, Constitutional Revision Measure (1970)

1968
- Florida Amendment 1, Constitution Revision Measure (1968)

- Oregon Measure 2, Change Initiative and Referendum Signature Requirements from Based on Supreme Court to Gubernatorial Election Turnout Amendment (May 1968)

- Wyoming Amendment 2, Initiative and Referendum Process Measure (1968)

1966
1962
- Maryland Change the Number of Signatures Required on a Petition, Amendment 2 (1962)

- Nevada Question 2, Replace Indirect Process and Require Initiated Constitutional Amendments to Pass Twice Initiative (1962)

1958
- Nevada Question 1, Signature Increase and Distribution Requirement for Initiatives Amendment (1958)

- North Dakota Direct Democracy and Publicity Pamphlet, Referendum 2 (1958)

1956
1954
1952
- Oklahoma State Question 353, Single-Subject Rule and Separate-Vote Requirement for Constitutional Amendments Measure (July 1952)

- Washington Substitute SJR 7, Limits on Legislative Alteration of Voter-Approved Ballot Measures Amendment (1952)

1951
1950
- California Proposition 2, Prohibit Naming Individuals to Public Office Through Ballot Measures Amendment (1950)

- Maine Proposed Constitutional Amendment 2, Change Filing Date for Initiated Legislation Measure (September 1950)

- Massachusetts Question 2, Percentage-Based Signature Requirement for Citizen-Initiated Ballot Measures Amendment (1950)

1948
- California Proposition 10, Single-Subject Rule for Initiatives Amendment (1948)

- Maine Proposed Constitutional Amendment 1, Change Initiative Petition Signature Requirements Measure (September 1948)

1946
1944
1942
- North Dakota Constitutional Amendments Referendum (1942)

- North Dakota Direct Democracy Referendum (1942)

1941
- Michigan Proposal 1, Initiated Constitutional Amendment Signature Verification and Fraud Penalties Amendment (April 1941)

- Michigan Proposal 2, Initiated Statute and Referendum Signature Verification and Fraud Penalties Amendment (April 1941)

1940
- Missouri Amendment 4, Change Signature Requirement Basis for Initiative Petitions Measure (1940)

- North Dakota Legislative Power and Direct Democracy Referendum (1940)

1939
1938
1936
1934
- Colorado Measure 4, Voters to Impose or Approve Excise Taxes Initiative (1934)

- Idaho HJR 7, Simple Majority Vote for Citizen Initiatives Measure (1934)

1932
- California Proposition 8, Attorney General to Write Ballot Titles and Summaries for Initiatives Amendment (1932)

- North Dakota Future Constitutional Amendments Referendum (1932)

- North Dakota Legislative Power and Direct Democracy Referendum (1932)

1924
- Missouri Amendment 2, Initiative and Referendum Signature Requirement Increase Measure (February 1924)

- South Dakota Referred Law 3, Primary Elections Law Referendum (1924)

1922
- California Proposition 27, Initiative Signature Requirement Initiative (1922)

- South Dakota Amendment B, Initiative and Referendum Signature Increase Measure (1922)

1920
- California Proposition 4, Initiative Signature Requirement Initiative (1920)

- Nebraska Amendment 39, Constitutional Amendment Vote Requirements Amendment (September 1920)

- Nebraska Amendment 4, Initiative and Referendum Signature Requirements Amendment (September 1920)

1918
- Colorado Measure 5, Publication of Ballot Measures Amendment (1918)

- Massachusetts Question 1, Initiative and Referendum Process Amendment (1918)

- North Dakota Requirements for Constitutional Amendment Passage Initiative (1918)

- North Dakota Simplified Initiative and Referendum Process Initiative (1918)

- Ohio Veto Referendums on Legislative Ratification of Federal Constitutional Amendments Initiative (1918)

1916
- Arizona Measure Nos. 100-101, Require Majority of Votes Cast in Election to Approve Ballot Initiatives Amendment (1916)

- Minnesota Amendment 7, Initiative and Referendum Measure (1916)

- Washington Referendum 3, Require Initiative and Referendum Petition Signers to Sign in Presence of Registration Officer Measure (1916)

1915
- California Proposition 7, Two-Thirds Vote Requirement for Initiated Bond Measures Amendment (October 1915)

- Maryland Amendment 4, Establish Veto Referendum Amendment (1915)

- Ohio Prohibit Re-Submitting Twice Rejected Constitutional Amendments for Six Years Initiative (1915)

1914
- Arizona Measure Nos. 102-103, Eight-Year Waiting Period for Repeated Prohibition Elections Initiative (1914)

- Arizona Measure Nos. 108-109, Prohibit Legislative Changes or Governor's Veto of Initiatives and Referendums Amendment (1914)

- Colorado Measure 1, Rules on Rejected and Conflicting Initiative Initiative (1914)

- Colorado Measure 4, Right to Petition Governor for Special Election on Measures Initiative (1914)

- Minnesota Amendment 1, Initiative and Referendum Measure (1914)

- Mississippi Initiative and Referendum Amendment (1914)

- Missouri Amendment 1, Initiative and Referendum Tax-Related Subject Restrictions Measure (1914)

- North Dakota Establish Initiated Constitutional Amendments Measure (1914)

- North Dakota Initiative and Referendum Measure (1914)

- South Dakota Amendment 4, Municipal Initiative and Referendum Measure (1914)

- Texas Proposition 1, Initiative and Referendum Process Amendment (1914)

- Wisconsin Question 2, Initiative and Referendum Amendment (1914)

- Wisconsin Question 8, Provide for Initiated Constitutional Amendments Measure (1914)

1913
- Michigan Initiatives and Referendums for Statutes Amendment (April 1913)

- Michigan Initiatives for Constitutional Amendments Amendment (April 1913)

1912
- Colorado Measure 11, Special Elections for Initiatives and Referendums Initiative (1912)

- Colorado Measure 14, Headless Ballot Initiative (1912)

- Idaho SJR 12, Veto Referendum Process Amendment (1912)

- Idaho SJR 13, Initiative Process Amendment (1912)

- Mississippi Initiative and Referendum Amendment (1912)

- Nebraska Amendment 1, Initiative and Referendum Amendment (1912)

- Nevada State Question 1, Nevada Initiative and Referendum Amendment (1912)

- Ohio Initiative and Referendum Process Amendment (September 1912)

- Ohio Simple Majority Vote for Constitutional Amendments Measure (September 1912)

- Oregon Measure Nos. 310-311, Require Majority of Votes Cast in Election to Approve Constitutional Amendments Measure (1912)

- Oregon Measure Nos. 322-323, Require Majority of Votes Cast in Election to Approve Ballot Initiatives Measure (1912)

- Washington Initiative and Referendum Process Amendment (1912)

- Wyoming Amendment 1, Initiative and Referendum Measure (1912)

1911
1910
- Arkansas Amendment 10, Initiative and Referendum Process Measure (September 1910)

- Colorado Referendum 3, Initiative and Referendum Amendment (1910)

- Illinois Initiative and Referendum Process Advisory Question (1910)

- Oregon Measure Nos. 360-361, Direct Democracy, Electoral System, and Legislature Changes Initiative (1910)

1908
- Maine Initiative and Referendum Amendment (1908)

- Michigan Constitution Revision Measure (1908)

- Missouri Amendment 3, Initiative and Referendum Process Measure (1908)

1906
- Delaware Initiative and Referendum Advisory Question (1906)

- Montana Amendment 1, Initiative and Referendum Amendment (1906)

- Oregon Measure Nos. 314-315, Local Initiative and Referendum Process Initiative (June 1906)

1904
- Missouri Amendment 2, Initiative and Referendum Process Measure (1904)

- Nevada Question 1, Veto Referendum Process Amendment (1904)

1902
- Illinois Local Initiative and Referendum Process Advisory Question (1902)

- Illinois State Initiative and Referendum Process Advisory Question (1902)

- Oregon Measure Nos. 105-106, Initiative and Referendum Process Amendment (June 1902)

1900
1898
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