All Roll Calls
Yes: 202 • No: 15
CaliforniaAB 8532025-2026 Regular SessionHouseWALLET
California AI Transparency Act.
Sponsored By: Buffy Wicks (Democratic)
Signed by Governor
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Bill Overview
Analyzed Economic Effects
5 provisions identified: 3 benefits, 2 costs, 0 mixed.
Hosting sites must block undisclosed AI
Beginning January 1, 2027, GenAI hosting platforms cannot knowingly make available a GenAI system that lacks the required disclosures. Platforms must ensure the systems they offer include the notices required by law. This applies to websites or apps that let California residents download GenAI source code or model weights.
Large platforms must show AI sourcing
Beginning January 1, 2027, large online platforms must detect when compliant provenance data is in content they share. They must show a clear notice when that data is available, including the GenAI system or capture device name and whether a digital signature exists. They must let users view the data in the app or site, download a version with the data, or link to it. They must not knowingly remove compliant provenance data or signatures, when technically feasible. These duties apply only to data that follows widely adopted standards set by an established body.
New hidden tags on cameras by 2028
Beginning January 1, 2028, new capture devices first produced for sale in California must offer a hidden disclosure in captured content. By default, the device embeds the maker name, device name and version, and the time and date of creation or change. This applies when it is technically feasible and follows widely adopted standards from an established body.
Fines and start date for violations
The chapter takes effect August 2, 2026. Violators face a $5,000 civil penalty per violation. Each day a violation continues counts as a new violation. The Attorney General, a city attorney, or county counsel can sue, and a winning plaintiff can recover attorney’s fees and costs. Public prosecutors can also seek court orders and fees against certain third‑party licensee violations.
Who must follow the AI rules
The law defines who must follow the AI transparency rules. You are a covered provider if your GenAI system has over 1,000,000 monthly users and is publicly accessible in California. A large online platform is a public-facing social, file‑sharing, mass messaging, or stand‑alone search service with over 2,000,000 unique monthly users in the last 12 months. Broadband internet access and telecommunications services are excluded.
Sponsors & Cosponsors
Sponsor
Buffy Wicks
Democratic • House
Cosponsors
Josh Becker
Democratic • Senate
Rick Chavez Zbur
Democratic • House
Roll Call Votes
House vote • 9/12/2025
Item 126 — Assembly AFLOOR
Yes: 60 • No: 4
Senate vote • 9/11/2025
Item 152 — Senate SFLOOR
Yes: 30 • No: 6
legislature vote • 8/29/2025
Vote in CS61
Yes: 5 • No: 2
legislature vote • 8/18/2025
Vote in CS61
Yes: 7 • No: 0
legislature vote • 7/15/2025
Vote in CS53
Yes: 11 • No: 0
House vote • 6/2/2025
Item 374 — Assembly AFLOOR
Yes: 58 • No: 2
legislature vote • 5/23/2025
Vote in CX25
Yes: 11 • No: 0
legislature vote • 4/29/2025
Vote in CX13
Yes: 9 • No: 0
legislature vote • 4/22/2025
Vote in CX32
Yes: 11 • No: 1
Actions Timeline
Chaptered by Secretary of State - Chapter 674, Statutes of 2025.
10/13/2025SenateApproved by the Governor.
10/13/2025legislatureEnrolled and presented to the Governor at 3 p.m.
9/24/2025legislatureSenate amendments concurred in. To Engrossing and Enrolling. (Ayes 60. Noes 4. Page 3381.).
9/12/2025HouseIn Assembly. Concurrence in Senate amendments pending.
9/12/2025HouseRead third time. Passed. Ordered to the Assembly. (Ayes 30. Noes 6. Page 2906.).
9/11/2025SenateRead second time. Ordered to third reading.
9/8/2025SenateRead third time and amended. Ordered to second reading.
9/5/2025SenateRead second time. Ordered to third reading.
8/29/2025SenateFrom committee: Do pass. (Ayes 5. Noes 2.) (August 29).
8/29/2025SenateIn committee: Referred to suspense file.
8/18/2025SenateRead second time and amended. Re-referred to Com. on APPR.
7/17/2025SenateFrom committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 11. Noes 0.) (July 15).
7/16/2025SenateReferred to Com. on JUD.
6/11/2025SenateIn Senate. Read first time. To Com. on RLS. for assignment.
6/3/2025SenateRead third time. Passed. Ordered to the Senate. (Ayes 58. Noes 2. Page 1908.)
6/2/2025HouseRead second time. Ordered to third reading.
5/27/2025HouseRead second time and amended. Ordered returned to second reading.
5/23/2025HouseFrom committee: Amend, and do pass as amended. (Ayes 11. Noes 0.) (May 23).
5/23/2025HouseAssembly Rule 63 suspended. (Ayes 51. Noes 16. Page 1644.)
5/23/2025HouseIn committee: Set, first hearing. Referred to APPR. suspense file.
5/7/2025HouseFrom committee: Do pass and re-refer to Com. on APPR. (Ayes 9. Noes 0.) (April 29). Re-referred to Com. on APPR.
4/30/2025HouseCoauthors revised.
4/30/2025HouseFrom committee: Do pass and re-refer to Com. on JUD. (Ayes 11. Noes 1.) (April 22). Re-referred to Com. on JUD.
4/23/2025HouseRe-referred to Com. on P. & C.P.
4/1/2025House
Bill Text
Chaptered
10/13/2025
Enrolled
9/16/2025
Amended Senate
9/5/2025
Amended Senate
7/17/2025
Amended Assembly
5/23/2025
Amended Assembly
3/28/2025
Introduced
2/19/2025