AB 366: Ignition interlock devices.

Official summary

Legislative Counsel’s Digest (official, as of the latest version). Written by nonpartisan legislative staff; reproduced verbatim.

Existing law, commencing January 1, 2019, made various changes to the law governing ignition interlock devices (IID), including, among other things, requiring a person who has been convicted of driving a motor vehicle under the influence of an alcoholic beverage, as specified, to install for a specified period of time as ordered by the court, an IID on the vehicle they operate, provided however that installation of an IID is discretionary for a first offender, as specified; authorizing a person convicted of driving a motor vehicle under the influence, if all other requirements are satisfied, including the installation of an IID, to apply for a restricted driver’s license without completing a period of license suspension or revocation; and requiring ignition interlock device manufacturers to be in compliance with specified provisions relating to payment for the costs of an ignition interlock device. Existing law makes these changes operative until January 1, 2026. On January 1, 2026, existing law, as it relates to these provisions, is generally reinstated to read as it read prior to January 1, 2019. Existing law makes it a crime to violate certain provisions relating to IIDs and motor vehicles equipped with IIDs.

This bill would extend the operation of these provisions until January 1, 2033, and would instead reinstate the law to how it read prior to January 1, 2019, on January 1, 2033. By extending the application of a crime, the bill would impose a state-mandated local program.

The California Constitution requires the state to reimburse local agencies and school districts for certain costs mandated by the state. Statutory provisions establish procedures for making that reimbursement.

This bill would provide that no reimbursement is required by this act for a specified reason.

Sponsors

Sponsors by party (alphabetical): Democratic 15 · Republican 6

“Support” is shown only as formal sponsorship recorded by the legislature. Roll-call votes are available on the official bill page.

Recent official actions

1. October 13, 2025Chaptered by Secretary of State - Chapter 689, Statutes of 2025.
2. October 13, 2025Approved by the Governor.
3. September 24, 2025Enrolled and presented to the Governor at 3 p.m.
4. September 13, 2025Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 78. Noes 0. Page 3478.).
5. September 13, 2025Assembly Rule 63 suspended. (Page 3477.)
6. September 13, 2025Joint Rules 61(a)(14) and 51(a)(4) suspended. (Ayes 59. Noes 20. Page 3413.)
7. September 13, 2025In Assembly. Concurrence in Senate amendments pending.
8. September 12, 2025Read third time. Passed. Ordered to the Assembly. (Ayes 37. Noes 0. Page 3004.).
9. September 2, 2025Read second time. Ordered to third reading.
10. August 29, 2025Read second time and amended. Ordered returned to second reading.
11. August 29, 2025From committee: Amend, and do pass as amended. (Ayes 7. Noes 0.) (August 29).
12. August 18, 2025In committee: Referred to suspense file.