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Bill

ACA 12

A resolution to propose to the people of the State of California an amendment to the Constitution of the State, by amending Section 3 of Article XIIIA thereof, by amending Section 1 of Article XIIIC thereof, by amending Section 7 of, and adding Section 11 to, Article XIX thereof, by amending Section 2 of, and adding Section 3 to, Article XIXB thereof, and by adding Article XIXE thereto, relating to taxation.

2025-2026 Regular Session Introduced by Greg Wallis

California constitutional amendment restructures tax law across five articles, requiring voter approval to reshape state taxation framework and revenue systems.

From printer. May be heard in committee April 26.
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Bill Summary · ACA 12

Legislative bill overview

ACA 12 proposes a comprehensive constitutional amendment affecting California's tax structure by modifying Articles XIIIA, XIIIC, XIX, XIXB, and creating a new Article XIXE. The bill makes multiple amendments to existing tax provisions and establishes new taxation frameworks that would require voter approval through a statewide ballot measure.

Why is this important

Constitutional tax amendments in California have substantial long-term implications because they're difficult to change and directly affect state revenue, property taxation, and fiscal policy. Since the bill is still in early stages (recently printed), the specific provisions aren't yet publicly detailed, but any multi-article constitutional tax restructuring would significantly impact how the state funds public services, education, and infrastructure.

Potential points of contention

  • Scope and complexity: Modifying five different constitutional articles simultaneously creates interconnected changes that may have unintended consequences across different tax systems
  • Revenue implications: Depending on specific provisions, the amendment could either increase or decrease state revenues, affecting funding for schools, healthcare, and other services
  • Property tax impacts: Changes to Article XIIIA (which governs Proposition 13) are historically contentious, as any modifications to property tax assessments trigger significant political debate
  • Voter understanding: The complexity of a multi-article amendment may make it difficult for voters to understand cumulative effects before voting
  • Implementation details: Without seeing the full text, there's uncertainty about transition rules and how existing taxpayers would be affected

Compiled from official sources — confirm details with the bill’s official record.

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