Rules · California

California’s AI Transparency Act to bar hosting of AI systems without disclosures

California AI Transparency Act. Providers of generative AI systems available in California must offer a free tool to check AI disclosures, and must put hidden disclosures in AI-made images, video and audio. AB 853 moved the start date. It added duties for large online platforms, hosting platforms and capture device makers. SB 1000 removed the user threshold and changed the disclosure rules again.

SB 942, Chapter 291, Statutes of 2024, as amended by AB 853 (Chapter 674, Statutes of 2025) and SB 1000 (Chapter 861, Statutes of 2026) (Bus. & Prof. Code § 22757 et seq.) · in force

Every date

in date order · as of 12 Nov 2026

1 Jan 2026 take effect · replaced, moved 213 days later, to 2 Aug 2026 The first start date of the California AI Transparency Act. AB 853 moved it to August 2, 2026. For: covered providers of generative AI systems. 22757.6. This chapter shall become operative on January 1, 2026. — SB 942 (2024), Chapter 291, Statutes of 2024, as chaptered
2 Aug 2026 take effect The Act takes effect. A covered provider must offer a free disclosure verification tool. Where it is technically feasible, it must also put a hidden (latent) disclosure in image, video and audio content that its generative AI system makes or changes. For: covered providers of generative AI systems (as SB 1000 amended the Act). 22757.6. This chapter shall become operative on August 2, 2026. — AB 853 (2025), Chapter 674, Statutes of 2025, as chaptered
30 Sep 2026 change its disclosure rules SB 1000 takes effect at once, as an urgency statute. It removes the user threshold from “covered provider” and renames the AI detection tool as a “disclosure verification tool”. It removes the duty to offer a visible disclosure, and adds to what the hidden disclosure must state. It delays the Act for assistive technology, and bars false claims that a system is assistive technology. For: covered providers of generative AI systems. This act is an urgency statute necessary for the immediate preservation of the public peace, health, or safety within the meaning of Article IV of the California Constitution and shall go into immediate effect. — SB 1000 (2026), Chapter 861, Statutes of 2026, as chaptered; date from urgency statute, in effect on approval
1 Jan 2027 bar hosting of AI systems without disclosures A hosting platform must not knowingly offer a generative AI system that does not place the disclosures the Act requires. For: GenAI system hosting platforms. 22757.3.2. (a) A GenAI system hosting platform shall not knowingly make available a GenAI system that does not place disclosures pursuant to Section 22757.3. (b) This section shall become operative on January 1, 2027. — AB 853 (2025), Chapter 674, Statutes of 2025, as chaptered
1 Jan 2027 require provenance checks on large platforms A large online platform must detect standard provenance data in content it distributes. It must show users what provenance data is available and let them inspect it. Where technically feasible, it must not knowingly remove that data. For: large online platforms. 22757.3.1. (a) A large online platform shall do all of the following: … (c) This section shall become operative on January 1, 2027. — AB 853 (2025), Chapter 674, Statutes of 2025, as chaptered
1 Jan 2028 require provenance data on new capture devices For each capture device it first makes for sale in California on or after this date, a maker must embed a hidden disclosure in captured content by default, and must let users choose to include one. This applies only where technically feasible and where it complies with widely adopted standards. For: capture device manufacturers. 22757.3.3. (a) A capture device manufacturer shall, with respect to any capture device the capture device manufacturer first produced for sale in the state on or after January 1, 2028 … (c) This section shall become operative on January 1, 2028. — AB 853 (2025), Chapter 674, Statutes of 2025, as chaptered
1 Jan 2029 end its exemption for assistive technology The exemption for generative AI systems designed mainly as assistive technology ends, and the Act applies to them. From this date the hidden disclosure must also state whether a system is made mainly as assistive technology, and the penalty for false assistive-technology claims ends. For: providers of generative AI systems made as assistive technology. (b) Before January 1, 2029, this chapter does not apply to a GenAI system that is designed to primarily function as assistive technology. — SB 1000 (2026), Chapter 861, Statutes of 2026, as chaptered

Sources

rules.csv rules.ics Every dataset → Status → Glossary →

California Legislature, Legislative Counsel: SB 942 (2024), Chapter 291, Statutes of 2024, as chaptered (chaptered bill text, from the Legislature's pubinfo file), read 27 Oct 2026; the copy kept 27 Oct 2026 has sha256 d5e313c1d995.
California Legislature, Legislative Counsel: AB 853 (2025), Chapter 674, Statutes of 2025, as chaptered (chaptered bill text, from the Legislature's pubinfo file), read 27 Oct 2026; the copy kept 27 Oct 2026 has sha256 f69387024f91.
California Legislature, Legislative Counsel: SB 1000 (2026), Chapter 861, Statutes of 2026, as chaptered (chaptered bill text, from the Legislature's pubinfo file), read 27 Oct 2026; the copy kept 27 Oct 2026 has sha256 4fe006c5fc88.
California Legislature, Legislative Counsel: California Constitution, Article IV, Section 8 (code section text, from the Legislature's pubinfo file), read 27 Oct 2026; the copy kept 27 Oct 2026 has sha256 3c2542be34d8.