Proposition 43 Limits Voters' Ability to Raise Revenues for Local Government Services

Amendment · 1 model · value list 1-draft.r4 · prompt v1

The name above identifies the measure on the ballot. The models never saw it. They read only the measure's own text, from the official source.

Only one model has been run on this measure so far. Results marked “1/1 models” have not been checked by a second model.

What the text touches

The text bears on 8 of the 83 values we check. Each value is something some people care about. A measure that supports one often conflicts with another, so both are shown, side by side, with the words that cause them.

Supports the text moves things the way this value wants (3) Conflicts with the text moves things the other way (5) Both some of each (0)

Money and taxesHousehold taxes and fees (supports)Funding for public services (conflicts with)Budget flexibility (conflicts with)

Government power and accountabilityLimits on government reach (supports)Government programs and powers (conflicts with)Local control (conflicts with)Statewide uniform rules (supports)

Elections and democracyCitizens' power to propose and repeal laws (conflicts with)

By value

Open a value to see what the text does to it and why.

Money and taxes

Household taxes and fees Supports 1/1 models

About: Taxes and fees paid by individuals and families. Supported when: they go down.

Supports Prop 43 §4.5(a) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose, extend, or increase any special tax, except as provided in Section 4 of this article, subdivision (d) of Section 2 of Article XIII C, and paragraph (2) of subdivision (a) of Section 3 of Article XIII D, unless and until that tax is submitted to the electorate and approved by a two-thirds vote.”
It protects households from special tax increases by requiring a two-thirds supermajority for them to pass.
Supports Prop 43 §4.5(b) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose ad valorem taxes on real property, except as provided in paragraph (1) of subdivision (a) of Section 3 of Article XIII D.”
It shields households from new local property taxes based on the value of their property.

Funding for public services Conflicts with 1/1 models

About: Money available for public services. Supported when: it goes up.

Conflicts with Prop 43 §4.5(a) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose, extend, or increase any special tax, except as provided in Section 4 of this article, subdivision (d) of Section 2 of Article XIII C, and paragraph (2) of subdivision (a) of Section 3 of Article XIII D, unless and until that tax is submitted to the electorate and approved by a two-thirds vote.”
It makes it more difficult to generate funding for local public services by imposing a strict supermajority requirement for special taxes.
Conflicts with Prop 43 §4.5(b) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose ad valorem taxes on real property, except as provided in paragraph (1) of subdivision (a) of Section 3 of Article XIII D.”
It closes off ad valorem property taxes as a potential source of revenue to fund local public services.

Budget flexibility Conflicts with 1/1 models

About: Spending locked in (earmarks, automatic increases, continuous appropriation) or limits locked in (caps, supermajority rules). Supported when: fewer lock-ins of either kind.

Conflicts with Prop 43 §4.5(a) stated 1/1 models
“unless and until that tax is submitted to the electorate and approved by a two-thirds vote.”
It creates a new supermajority lock-in by requiring a two-thirds vote of the electorate for any local special tax.

Government power and accountability

Limits on government reach Supports 1/1 models

About: Government agencies, programs, mandates, staff, regulatory powers, and spending authority. Supported when: any of these is removed or reduced. Read from the other side, this is “Government programs and powers”.

Supports Prop 43 §4.5(a) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose, extend, or increase any special tax, except as provided in Section 4 of this article, subdivision (d) of Section 2 of Article XIII C, and paragraph (2) of subdivision (a) of Section 3 of Article XIII D, unless and until that tax is submitted to the electorate and approved by a two-thirds vote.”
It limits the taxing and spending authority of local governments by requiring a two-thirds supermajority vote for special taxes.
Supports Prop 43 §4.5(b) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose ad valorem taxes on real property, except as provided in paragraph (1) of subdivision (a) of Section 3 of Article XIII D.”
It removes the power of local governments to impose property taxes based on value.

Government programs and powers Conflicts with 1/1 models

About: Government agencies, programs, mandates, staff, regulatory powers, and spending authority. Supported when: any of these is created or expanded. Read from the other side, this is “Limits on government reach”.

Conflicts with Prop 43 §4.5(a) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose, extend, or increase any special tax, except as provided in Section 4 of this article, subdivision (d) of Section 2 of Article XIII C, and paragraph (2) of subdivision (a) of Section 3 of Article XIII D, unless and until that tax is submitted to the electorate and approved by a two-thirds vote.”
It constrains local government spending and revenue authority by making special taxes subject to a two-thirds vote.
Conflicts with Prop 43 §4.5(b) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose ad valorem taxes on real property, except as provided in paragraph (1) of subdivision (a) of Section 3 of Article XIII D.”
It shrinks local government revenue authority by banning the imposition of ad valorem property taxes.

Local control Conflicts with 1/1 models

About: Authority split between local governments and the state (preemption). Supported when: authority moves to local governments. Read from the other side, this is “Statewide uniform rules”.

Conflicts with Prop 43 §4.5(a) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose, extend, or increase any special tax, except as provided in Section 4 of this article, subdivision (d) of Section 2 of Article XIII C, and paragraph (2) of subdivision (a) of Section 3 of Article XIII D, unless and until that tax is submitted to the electorate and approved by a two-thirds vote.”
It restricts local autonomy by forcing local governments to meet a supermajority requirement for special taxes.
Conflicts with Prop 43 §4.5(b) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose ad valorem taxes on real property, except as provided in paragraph (1) of subdivision (a) of Section 3 of Article XIII D.”
It preempts local governments from choosing to levy property taxes based on assessed value.

Statewide uniform rules Supports 1/1 models

About: Authority split between local governments and the state (preemption). Supported when: authority moves to the state. Read from the other side, this is “Local control”.

Supports Prop 43 §4.5(a) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose, extend, or increase any special tax, except as provided in Section 4 of this article, subdivision (d) of Section 2 of Article XIII C, and paragraph (2) of subdivision (a) of Section 3 of Article XIII D, unless and until that tax is submitted to the electorate and approved by a two-thirds vote.”
It imposes a strict statewide rule limiting how local governments can raise special taxes.
Supports Prop 43 §4.5(b) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose ad valorem taxes on real property, except as provided in paragraph (1) of subdivision (a) of Section 3 of Article XIII D.”
It enforces a statewide prohibition against local governments levying ad valorem property taxes.

Elections and democracy

Citizens' power to propose and repeal laws Conflicts with 1/1 models

About: Initiative, referendum, and recall requirements. Supported when: they get easier.

Conflicts with Prop 43 §4.5(a) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose, extend, or increase any special tax, except as provided in Section 4 of this article, subdivision (d) of Section 2 of Article XIII C, and paragraph (2) of subdivision (a) of Section 3 of Article XIII D, unless and until that tax is submitted to the electorate and approved by a two-thirds vote.”
It makes it harder for voters to pass special taxes via local initiatives by explicitly requiring a two-thirds majority rather than a simple majority.
Conflicts with Prop 43 §4.5(b) stated 1/1 models
“no local government, including the electorate of a local government exercising the initiative power, may impose ad valorem taxes on real property, except as provided in paragraph (1) of subdivision (a) of Section 3 of Article XIII D.”
It strips local voters of the ability to propose and pass ad valorem property taxes through the initiative process.

Certainty: stated = the text does it; likely = follows directly; depends on implementation = turns on future rules, funding, or courts. Each explanation is one model's wording; the badge shows how many models cite the same words.

By section of the text

The same results, arranged by where they come from. One section often supports some values and conflicts with others.

Prop 43 Preamble Proposes to amend the California Constitution by adding Section 4.5 to Article XIII A.

No value found here by a majority of models.
Prop 43 §4.5(a) Prohibits local governments and their electorates from imposing, extending, or increasing special taxes without a two-thirds voter approval, starting January 1, 2027.

Supports
Household taxes and fees (supports)Limits on government reach (supports)Statewide uniform rules (supports)

Conflicts with
Funding for public services (conflicts with)Budget flexibility (conflicts with)Government programs and powers (conflicts with)Local control (conflicts with)Citizens' power to propose and repeal laws (conflicts with)
Prop 43 §4.5(b) Prohibits local governments and their electorates from imposing ad valorem taxes on real property, with limited exceptions.

Supports
Household taxes and fees (supports)Limits on government reach (supports)Statewide uniform rules (supports)

Conflicts with
Funding for public services (conflicts with)Government programs and powers (conflicts with)Local control (conflicts with)Citizens' power to propose and repeal laws (conflicts with)
Prop 43 §4.5(c) Specifies that the terms "local government" and "special tax" have the same definitions as in Section 1 of Article XIII C.

No value found here by a majority of models.

Who is for and against it

No campaign data collected for this measure yet.

How the text is written

Drafting features, not effects.

Override language ("notwithstanding any other provision of law") · Prop 43 §4.5(a) 1/1 models
Explicit override of other constitutional articles.
Effective date and phase-in · Prop 43 §4.5(a) 1/1 models
Sets a specific effective date for the restriction on special taxes.
Override language ("notwithstanding any other provision of law") · Prop 43 §4.5(b) 1/1 models
Explicit override of other constitutional articles.

Analysis inference

Predictions and context from the models. Unlike the results above, these are not what the text says. They are reasoning about what may follow.

Prop 43 Preamble 2 questions

Compared to what?: Current law was not provided. Based on the measure text alone, this measure amends the state constitution to require a two-thirds voter approval for any local special tax, explicitly including those proposed by citizen initiative. It also prohibits local governments, including through the initiative power, from imposing ad valorem property taxes, subject to limited existing constitutional exceptions. (gemini-3.1-pro-preview)
Can it be undone?: Because this is a constitutional amendment, it can only be undone or modified by another constitutional amendment approved by a majority of statewide voters. (gemini-3.1-pro-preview)

Prop 43 §4.5(a) 7 questions

What does it cost, including what doesn't show up in the budget?: Direct costs include the expense of holding elections to seek two-thirds approval for special taxes. Opportunity costs involve the foregone revenue that local governments will be unable to collect if a special tax garners a majority but falls short of the two-thirds threshold, or the revenue lost from the ban on new ad valorem property taxes. (gemini-3.1-pro-preview)
Who pays and who benefits in practice?: Property owners and taxpayers benefit practically by avoiding higher tax burdens. Local governments and residents who rely on local public services (such as targeted infrastructure, health, or safety programs often funded by special taxes) bear the cost of reduced funding flexibility and a higher barrier to raising revenue. (gemini-3.1-pro-preview)
How will people, businesses, and agencies respond?: Local governments may respond by relying more heavily on general taxes (if subject to a lower threshold), increasing user fees, or reducing public services. Citizen groups may shift their focus away from local ballot initiatives toward state-level campaigns or alternative funding mechanisms, as local special tax initiatives will face a much higher hurdle to pass. (gemini-3.1-pro-preview)
What problem does it address, and does the mechanism reach it?: The measure addresses the perceived problem of local taxes being raised too easily, particularly through citizen initiatives that might previously have bypassed supermajority thresholds. The mechanism is a constitutional amendment strictly mandating a two-thirds voter approval for all local special taxes regardless of their origin, and banning local ad valorem property taxes outright. (gemini-3.1-pro-preview)
Who gains power or discretion?: A minority of voters (more than one-third) gains the power to veto local special tax increases. Property owners gain stronger protection from tax increases. Local elected officials and citizen groups lose the power to establish special taxes with a simple majority or to levy ad valorem property taxes. (gemini-3.1-pro-preview)
Is the effect empirically settled or disputed?: disputed Whether supermajority requirements for taxes effectively restrain government growth or simply shift the tax burden to less efficient fees and general taxes is disputed among economists and policy researchers. Researchers also disagree on whether limiting local property taxes forces local governments into fiscal distress or encourages more efficient public spending. (gemini-3.1-pro-preview)
How much is lost in administration and enforcement?: Administration costs will primarily stem from election administration for the required ballot measures. There may also be enforcement and litigation costs regarding whether a proposed charge qualifies as a "special tax" subject to the two-thirds requirement, or a fee or general tax. (gemini-3.1-pro-preview)

Full text

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Prop 43 Preamble Resolved by the Assembly, the Senate concurring, That the Legislature of the State of California at its 2025–26 Regular Session commencing on the second day of December 2024, two-thirds of the membership of each house concurring, hereby proposes to the people of the State of California, that the Constitution of the State be amended as follows: That Section 4.5 is added to Article XIII A thereof, to read:

Prop 43 §4.5(a) (a) Beginning on January 1, 2027, and notwithstanding Article II and Article XI, no local government, including the electorate of a local government exercising the initiative power, may impose, extend, or increase any special tax, except as provided in Section 4 of this article, subdivision (d) of Section 2 of Article XIII C, and paragraph (2) of subdivision (a) of Section 3 of Article XIII D, unless and until that tax is submitted to the electorate and approved by a two-thirds vote.

Prop 43 §4.5(b) (b) Notwithstanding Article II and Article XI, no local government, including the electorate of a local government exercising the initiative power, may impose ad valorem taxes on real property, except as provided in paragraph (1) of subdivision (a) of Section 3 of Article XIII D.

Prop 43 §4.5(c) (c) “Local government” and “special tax” shall have the same meaning as provided in Section 1 of Article XIII C.

Source

Assembly Constitutional Amendment 22 (Resolution Chapter 132, Statutes of 2026), California Legislative Information.

Official copy (leginfo.legislature.ca.gov, fetched 2026-10-27)
Our archived copy SHA-256 58afb4bc8355704c…, the same file as fetched
Import log every change made turning the file into the text above (layout only)

How we got this

Model	Version reported	Runs used	Attempts	Rejected
gemini-3.1-pro-preview via vertex	gemini-3.1-pro-preview	1	1	0

Rejected attempts failed validation (a quote not in the text, a value skipped, a result that doesn't match its evidence, a missing mirror, a blocked word, malformed output) and were rerun. They are kept in the bundle.

Every value any model found (8)

Value	Status	gemini-3.1-pro-preview
Household taxes and fees	consensus	supports (1/1)
Funding for public services	consensus	conflicts (1/1)
Budget flexibility	consensus	conflicts (1/1)
Limits on government reach	consensus	supports (1/1)
Government programs and powers	consensus	conflicts (1/1)
Local control	consensus	conflicts (1/1)
Statewide uniform rules	consensus	supports (1/1)
Citizens' power to propose and repeal laws	consensus	conflicts (1/1)

consensus: a majority of models reached the same result · split: two or more found an effect without a majority · outlier: one model only · below half: found in fewer than half of that model's runs. Values no model found in any run are not listed.

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