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 XIII A thereof, by amending Section 1 of Article XIII C 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 XIX B thereof, and by adding Article XIX E thereto, relating to taxation.
ACA 12 is a proposed constitutional amendment that would create a new constitutional framework for “road usage charges,” meaning mileage-based charges imposed by the state or local governments for the use or operation of motor vehicles on public streets and highways. The measure would require any such charge to be imposed at a uniform rate and would treat it as a tax for purposes of California’s existing state and local tax-vote rules, rather than as a fee tied to use of government property. As a result, a state road usage charge would be subject to the Legislature’s two-thirds vote requirement for tax increases, and a local road usage charge would be subject to local voter approval requirements applicable to special taxes.
The bill also places substantial limits on how road usage charge revenues could be used. Revenues, after collection costs and authorized refunds, would have to be spent solely on transportation purposes, including streets and highways, public transportation, related nonmotorized facilities, environmental mitigation, and associated administrative costs. The measure would prohibit the Legislature from using road usage charge revenues to pay principal or interest on certain state transportation bonds unless the bond act expressly allows it, and would generally bar borrowing or diverting those revenues except as specifically authorized. It also directs the Legislature to enact implementing statutes.
ACA 12 would further prevent the state from imposing both a road usage charge and existing motor vehicle fuel-related taxes on fuels used in vehicles subject to the road usage charge. It would amend constitutional provisions governing the Highway Users Tax Account and the Transportation Investment Fund to carve out road usage charges from existing replacement-revenue rules, while preserving the current dedicated transportation funding structure for fuel tax revenues. In practical terms, the measure would reshape how California could transition from fuel taxes to mileage-based road pricing, while keeping road usage charge revenues tightly dedicated to transportation uses.
The general sentiment reflected in the available record is limited because there are no committee transcripts or recorded votes yet. Based on the bill’s structure, it appears designed to constrain future adoption of road pricing by requiring supermajority or voter approval and by locking in revenue-use restrictions. That suggests the measure is likely to appeal to taxpayers and opponents of new transportation charges, while potentially drawing concern from transportation planners and policymakers who may want more flexibility to implement mileage-based funding systems.
The main point of contention is likely to be whether road usage charges should be treated as taxes subject to heightened approval thresholds, or as transportation user fees that could be adopted more flexibly. Supporters of the measure would likely emphasize taxpayer protections, uniformity, and restrictions on revenue diversion. Opponents would likely argue that the bill makes it harder to replace declining fuel-tax revenue with a modern road funding mechanism and could limit the state’s ability to manage transportation finance, congestion, and electrification-related revenue loss. No formal opposition or support is documented in the provided history, but those are the likely fault lines.
ACA 12 would amend multiple provisions of the California Constitution, including Articles XIII A, XIII C, XIX, XIX B, and a new Article XIX E, to classify road usage charges as taxable levies subject to existing state and local tax approval rules. It would also create new constitutional limits on the collection, use, and financing of mileage-based road charges, including a uniform-rate requirement, a transportation-only spending mandate, and a prohibition on double-charging vehicles through both a road usage charge and certain fuel taxes. These changes would directly affect the Legislature, local governments, transportation agencies, and any future road pricing program in California.
There is no recorded committee debate or vote history in the provided materials, so the formal sentiment is not documented. The bill’s text indicates a cautious, restrictive approach to road usage charges, suggesting a policy preference for limiting new transportation charges and ensuring voter or supermajority approval. In general, the measure appears aligned with taxpayer-protection concerns and skepticism toward mileage-based fees, while likely being less attractive to transportation funding advocates who favor flexibility in replacing fuel-tax revenue.
The central contention is whether a road usage charge should be treated as a tax requiring a two-thirds legislative vote or local voter approval, or as a user fee that can be implemented more easily. Another major dispute is revenue control: the bill requires road usage charge proceeds to be used only for transportation purposes and limits borrowing, diversion, and bond repayment uses, which could be seen as protecting funds but also reducing fiscal flexibility. A further point of tension is the prohibition on imposing both a road usage charge and fuel taxes on the same vehicles, which could complicate the transition from gas-tax-based funding to mileage-based funding.