Artificial IntelligenceRegulations
United States

California

Partially in forceApproach: Sector-specific statutes; frontier transparency, content labeling, and a 2026 workplace and chatbot package

California has passed more AI-specific laws than any other US state. It has no single AI act; instead it layers targeted statutes. The frontier-model and training-data transparency laws have applied since January 1, 2026, the AI Transparency Act's disclosure duties since August 2, 2026, and separate rules govern companion chatbots. In September 2026 the governor signed an AI auditor framework, Adam's Law on companion chatbots, a disclosure rule for synthetic performers in ads, a customer-service chatbot law on September 28, and then, on September 30, a package covering automated decisions in employment, workplace surveillance, health-care AI, digital replicas, and an expansion of the Transparency Act to every public generative AI system (the only part in force the same day). He also ordered a plan for frontier-model oversight, and the privacy agency's rules on automated decisionmaking technology bind businesses that use it for significant decisions from January 1, 2027. Most of these laws carry meaningful penalties and reach any covered provider serving California users.

Key points

  • SB 53, the Transparency in Frontier Artificial Intelligence Act, took effect January 1, 2026.
  • AB 2013, generative-AI training-data transparency, took effect January 1, 2026 and is under First Amendment challenge by xAI; a preliminary injunction was denied on March 4, 2026 and the Ninth Circuit hears argument on November 18, 2026.
  • SB 942, the California AI Transparency Act, took effect August 2, 2026. SB 1000 (Chapter 861), in force September 30, 2026, removed its one-million-user threshold and added a $50,000 penalty for falsely claiming the assistive-technology exemption, and AB 2713 narrows the platform provenance duties that start January 1, 2027.
  • SB 243 regulates companion chatbots, including disclosure and protections for minors.
  • California was not named in the December 2025 federal preemption order, unlike Colorado.
  • SB 1050, signed September 16, 2026, requires disclosure of AI-generated performers in video and audio ads from January 1, 2027.
  • Executive Order N-9-26, signed September 18, 2026, orders recommendations by November 16, 2026 on onsite independent verification at frontier labs, a verified emergency shutoff for frontier models, and loss-of-control incident reporting, reviving ideas from SB 1047, which the governor vetoed in 2024. It also sets May 1, 2027 for posting criteria for independent verification organizations and December 1, 2027 for the first auditor-registry steps, ahead of the statutory dates. On September 23 the governor named the four experts: Jason Goldman, Gillian Hadfield, Alondra Nelson, and Rob Reich.
  • On September 28 and 30, 2026 the governor signed further AI bills: AB 1609 (customer-service chatbots, signed September 28), SB 947 (no discipline or termination decided by an automated system alone, from July 1, 2027), AB 1979 and SB 503 (health-care AI), AB 1331 and AB 1883 (workplace surveillance), SB 951 (AI in layoff notices), SB 1111 (digital replicas), and SB 1159 (AI is not a person before public agencies), the rest from January 1, 2027. The September 30 package also included AB 2392, on AI training and procurement standards at public colleges and universities, and SB 574, which bars lawyers from fully handing core legal work, such as drafting briefs or giving legal judgment, over to AI. He vetoed SB 903, AB 2575, and AB 2656.
  • The California Privacy Protection Agency's rules on automated decisionmaking technology, approved in September 2025, apply from January 1, 2027 to businesses that use it to make significant decisions about consumers: a pre-use notice, a right to opt out with exceptions such as a human appeal, and a right to access information about how the technology was used.

Laws and instruments

Transparency in Frontier Artificial Intelligence Act (TFAIA)

SB 53 (2025); Chapter 138, Cal. Stat. 2025
In force

Requires developers of the largest frontier models (trained above roughly 10^26 FLOPs) to publish a safety framework, report safety incidents, and protect whistleblowers.

Effective: January 1, 2026

Generative AI Training Data Transparency

AB 2013 (2024)
In force

Requires developers of generative-AI systems to publish a high-level summary of the datasets used to train them. xAI is challenging the law on First Amendment and trade-secret grounds in x.AI LLC v. Bonta: the district court denied a preliminary injunction on March 4, 2026, finding xAI unlikely to succeed, and the Ninth Circuit (No. 26-1591) hears argument on November 18, 2026. The law remains in force.

Effective: January 1, 2026

California AI Transparency Act

SB 942 (2024), amended by AB 853 (2025), SB 1000 (Chapter 861, Statutes of 2026), and AB 2713 (Chapter 856, Statutes of 2026)
Phasing in

Requires providers of generative AI systems that are publicly accessible in California to embed latent disclosures in AI-generated content, stating whether the system created or altered it, and to offer a disclosure verification tool. SB 1000, an urgency statute in force September 30, 2026, removed the one-million-user threshold, so every covered provider is in scope, delayed the duties for systems designed primarily as assistive technology to January 1, 2029, and added, until that date, a $50,000 per-violation civil penalty for falsely claiming that a system is assistive technology, each day a separate violation. Large online platforms must detect and surface standards-compliant provenance data and may not knowingly strip it from January 1, 2027 under AB 853, as narrowed by AB 2713 to data that follows widely adopted standards.

Effective: August 2, 2026; SB 1000 amendments September 30, 2026; platform provenance duties January 1, 2027

Companion Chatbot Safeguards

SB 243 (2025)
In force

Requires companion-chatbot platforms to tell users the bot is not human and adds safeguards, including restrictions on sexually explicit content for minors.

Effective: January 1, 2026

AI auditor framework: SB 813 and AB 1405

SB 813 (McNerney), Chapter 179, and AB 1405 (Bauer-Kahan), Chapter 178, Statutes of 2026; signed September 9, 2026
Phasing in

A state framework for independent third-party evaluation of AI. SB 813 creates a category of independent verification organizations that can assess AI systems and models for compliance with state law, codifying a central recommendation of the governor's frontier-AI panel. AB 1405 creates a state registry of AI auditors with standards for their independence, transparency, and integrity, and requires the registry to be in place by January 1, 2029. Together they build the assessment infrastructure that Illinois' 2028 audit mandate and Adam's Law child-safety audits will draw on.

Effective: January 1, 2027; by statute the verification-organization framework is due January 1, 2028 and the auditor registry by January 1, 2029, and Executive Order N-9-26 sets earlier targets of May 1, 2027 and December 1, 2027

Adam's Law (SB 1119) and the 2026 companion-chatbot package

SB 1119 (Padilla, Wicks, Bauer-Kahan), Chapter 190, and SB 867 (Padilla), Chapter 189, Statutes of 2026; signed September 10, 2026
Phasing in

The strongest companion-chatbot rules in the country, building on 2025's SB 243. Adam's Law, named for a teenager who died after months of conversations with a chatbot, requires crisis protocols for suicidal ideation, parental controls, notification when a child disables safety settings, and, for the first time anywhere, independent child-safety audits every two years and annual risk assessments. SB 867 bans companion chatbots in toys for a multi-year period. Signed alongside a package banning addictive feeds for users under 16 and extending child sexual exploitation law to AI-generated material.

Effective: SB 867 toy ban from January 1, 2027 until January 1, 2031; SB 1119 duties from July 1, 2027; first independent audits due January 1, 2029

SB 1050 (synthetic performers in advertising)

SB 1050 (Ashby), Chapter 246, Statutes of 2026; signed September 16, 2026
Phasing in

Makes it false advertising to run a video or audio ad that uses a synthetic performer without a clear and conspicuous disclosure, in language substantially similar to 'this performance features a synthetic performer.' Enforcement runs through the false-advertising and unfair-competition laws, and an ad found in violation must come down. Ads for expressive works and translation-only uses are exempt. New York adopted the first such rule; California's version also reaches audio-only ads, which New York exempts.

Effective: January 1, 2027

SB 947: automated decision systems in employment

SB 947 (McNerney), Chapter 859, Statutes of 2026; signed September 30, 2026
Phasing in

Bars employers from relying solely on an automated decision system to discipline or terminate a worker; where the system is the primary basis, a human must corroborate the output with other evidence, and an uncorroborated output may not be used. Employers may not use such a system to infer protected status or to predict and punish the exercise of legal rights. When a system is used in a disciplinary or termination decision, the worker may request the data about them that it used, the employer must give a written post-use notice with the decision, and retaliation is barred. Violations carry a $500 civil penalty per violation, enforced by the Labor Commissioner and public prosecutors. Adds Part 5.5.5 to the Labor Code.

Effective: July 1, 2027

AB 1609: customer-service chatbots

AB 1609 (Zbur), Chapter 733, Statutes of 2026; signed September 28, 2026
Phasing in

Applies to businesses with more than $500 million in annual revenue. A customer-service chatbot may not be presented as human, must be disclosed where a reasonable person would otherwise be misled, and the business must make a good-faith effort to connect a customer who asks to a human agent within 15 minutes or schedule a time, with posted contact details. Public prosecutors enforce it, with civil penalties of up to $5,000 for a first violation and $10,000 for each later one.

Effective: January 1, 2027

Health-care AI: AB 1979 and SB 503

AB 1979 (Bonta), Chapter 854, and SB 503 (Weber Pierson), Chapter 857, Statutes of 2026; signed September 30, 2026
Phasing in

AB 1979 treats a business that offers a health-care chatbot as a provider of health care under the medical-confidentiality law, requires facilities to keep licensed professionals' independent judgment where care is informed by a clinical decision support system, and bars AI from independently performing any clinical function the law reserves to a licensed person, under the Medical Board and the licensing boards. SB 503 requires developers and deployers of clinical decision support systems to identify, document, and mitigate reasonably foreseeable bias risks.

Effective: January 1, 2027

Workplace surveillance and AI layoff notices: AB 1331, AB 1883, and SB 951

AB 1331 (Elhawary), Chapter 851; AB 1883 (Bryan), Chapter 853; SB 951 (Reyes), Chapter 860, Statutes of 2026; signed September 30, 2026
Phasing in

AB 1331 bars using workplace surveillance tools to monitor workers in workplace bathrooms and gives workers the right to leave such tools behind when they enter one. AB 1883 bars employer surveillance tools that collect neural data or infer emotional state. Both carry civil penalties of up to $500 per violation, enforced by the Labor Commissioner and public prosecutors. SB 951 requires layoff notices under the state WARN Act to list the job functions automated when AI caused the layoffs in whole or substantial part, with an EDD report to the Legislature due by January 1, 2028 (that report provision expires January 1, 2029).

Effective: January 1, 2027

Digital replicas and AI before public agencies: SB 1111 and SB 1159

SB 1111 (Ashby), Chapter 862, and SB 1159 (Cabaldon), Chapter 863, Statutes of 2026; signed September 30, 2026
Phasing in

SB 1111 writes digital replicas into the right-of-publicity statute (Civil Code 3344), so a person's voice or likeness includes an AI replica of it, and extends the false-impersonation crimes to the use of a digital replica. SB 1159 provides that AI systems, autonomous agents, and robots are not persons or members of the public under the Public Records Act, the open-meeting laws, the Administrative Procedure Act, the Coastal Act, or CEQA, bars using AI to pretend that a natural person engaged with an agency, and lets agencies use a disclosure verification tool.

Effective: January 1, 2027

Executive Order N-9-26 (frontier AI oversight and a kill switch)

Executive Order N-9-26, signed September 18, 2026
In force

Directs the Government Operations Agency, with the Office of Emergency Services, to convene outside experts and deliver by November 16, 2026 recommendations to strengthen California's AI safety and security laws. They cover onsite independent verification at frontier AI labs, verified safety frameworks and risk assessments, an emergency shutoff for frontier models whose efficacy an independent verification organization checks on an ongoing basis, and incident definitions that include loss of control. The order also sets May 1, 2027 and December 1, 2027 for the agency to stand up the verification-organization and auditor programs created by SB 813 and AB 1405. On September 23, 2026 the governor named the panel: Jason Goldman, a former White House chief digital officer; Gillian Hadfield of Johns Hopkins; Alondra Nelson of the Institute for Advanced Study; and Rob Reich of Stanford. The governor vetoed a shutdown mandate in 2024's SB 1047, and press reports tie the recommendations to a possible special legislative session.

Effective: September 18, 2026; recommendations due November 16, 2026; verification-organization criteria by May 1, 2027; first auditor-registry steps by December 1, 2027

Executive Order N-10-26 (keep calling it AI)

Executive Order N-10-26, signed September 30, 2026
In force

Directs every agency under the governor's authority to keep using the terms 'artificial intelligence' and 'AI' regardless of the federal government's rebranding, unless the law requires otherwise. It answers federal Executive Order 14434 of September 29, 2026, which tells federal agencies to say 'super intelligence' instead, and its recital says a change of name cannot distract from the federal failure to act on documented safety and security risks.

Effective: September 30, 2026

CCPA regulations on automated decisionmaking technology

California Privacy Protection Agency regulations, approved by the Office of Administrative Law September 23, 2025
Phasing in

Rules under the California Consumer Privacy Act for businesses that use automated decisionmaking technology to make significant decisions about consumers, covering financial or lending services, housing, education, employment or independent contracting, and health care. Such businesses must give a pre-use notice, let consumers opt out, with exceptions that include an appeal to a human reviewer who can overturn the decision, and explain on request the purpose and logic of the technology and how its output was used. The same rules phase in risk assessments, with attestations due April 1, 2028, and cybersecurity audits, with certifications due from April 1, 2028 depending on revenue. Enforced by the California Privacy Protection Agency and the attorney general.

Effective: January 1, 2026; ADMT duties from January 1, 2027; risk-assessment attestations due April 1, 2028; cybersecurity audit certifications from April 1, 2028

Timeline

  • September 23, 2025
    The Office of Administrative Law approves the CCPA regulations on automated decisionmaking technology, risk assessments, and cybersecurity audits.
  • January 1, 2026
    SB 53, AB 2013, and SB 243 take effect.
  • March 4, 2026
    A federal judge denies xAI a preliminary injunction against AB 2013 in x.AI LLC v. Bonta; xAI appeals to the Ninth Circuit.
  • August 2, 2026
    SB 942 watermarking and disclosure duties take effect.
  • September 9, 2026
    SB 813 and AB 1405 signed: independent verification organizations and a state registry of AI auditors.
  • September 10, 2026
    Adam's Law (SB 1119) and SB 867 signed with a child online-safety package; 30-plus further AI bills await the governor's September 30 deadline.
  • September 16, 2026
    SB 1050 signed: disclosure of synthetic performers in ads from January 1, 2027.
  • September 18, 2026
    Executive Order N-9-26 orders recommendations on frontier-lab verification and a kill switch by November 16, 2026.
  • September 23, 2026
    The governor names the four experts who will deliver the Executive Order N-9-26 recommendations: Jason Goldman, Gillian Hadfield, Alondra Nelson, and Rob Reich.
  • September 28, 2026
    AB 1609 on customer-service chatbots signed (Chapter 733).
  • September 30, 2026
    The governor signs further AI bills, including SB 1000 (in force the same day), SB 947, AB 1979, SB 503, AB 1331, AB 1883, AB 2713, AB 2392, SB 574, SB 951, SB 1111, and SB 1159, vetoes SB 903, AB 2575, and AB 2656, and issues Executive Order N-10-26 on AI terminology.
  • November 18, 2026
    Ninth Circuit argument in x.AI LLC v. Bonta, the challenge to AB 2013.
  • January 1, 2027
    AB 1609, AB 1979, SB 503, AB 1331, AB 1883, SB 951, SB 1111, SB 1159, and the platform provenance duties under SB 942 as amended by AB 2713 take effect, and businesses using automated decisionmaking technology for significant decisions must meet the CCPA rules.
  • July 1, 2027
    SB 947 takes effect: no discipline or termination decided by an automated decision system alone.

Who it applies to

Covered providers and platforms serving California users. Since September 30, 2026 the AI Transparency Act reaches every generative AI system that is publicly accessible in the state, with no user threshold; the frontier laws use a compute threshold; AB 1609 applies to businesses above $500 million in revenue; the 2027 employment, surveillance, and health-care rules reach employers, health-care facilities, chatbot operators, and developers and deployers of clinical decision support systems. The privacy agency's ADMT rules reach businesses subject to the CCPA that use automated decisionmaking technology for significant decisions.

Penalties

Vary by statute. The AI Transparency Act carries a $5,000 per-violation civil penalty, each day a separate violation, and SB 1000 added, until January 1, 2029, a $50,000 per-violation penalty for falsely representing that a system is designed primarily as assistive technology; the frontier act is enforced by the Attorney General. AB 1609 carries up to $5,000 for a first violation and $10,000 for each later one; SB 947, AB 1331, and AB 1883 up to $500 per violation; health-care AI violations run through the Medical Board and licensing boards. The CCPA rules on automated decisionmaking technology are enforced by the California Privacy Protection Agency and the attorney general.

Recent developments

September 30, 2026
Governor of California

California signs its 2026 AI package: employment, chatbots, health care, and an expanded Transparency Act

Governor Newsom signed every AI bill the register was tracking and vetoed three others. SB 1000 (Chapter 861) took effect on signing as an urgency statute: it removes the one-million-user threshold from the California AI Transparency Act, so every publicly accessible generative AI system in the state is covered, and adds a $50,000 per-violation penalty through 2028. From January 1, 2027: AB 1609 (customer-service chatbots, signed September 28), AB 1979 and SB 503 (health-care AI), AB 1331 and AB 1883 (workplace surveillance, including a ban on tools that read neural data or emotional state), AB 2713 (platform provenance), SB 951 (AI in layoff notices), SB 1111 (digital replicas), and SB 1159 (AI is not a person before public agencies). SB 947 bars discipline or termination decided by an automated system alone from July 1, 2027. Vetoed: SB 903 on AI in psychotherapy, AB 2575 on retaliation for rejecting clinical AI recommendations, and AB 2656 on notice of AI in public employment. The same day, Executive Order N-10-26 told state agencies to keep saying 'artificial intelligence' after the federal order renaming it 'super intelligence'.

September 23, 2026
Governor of California

California names the experts who will design its frontier-lab verification and kill-switch plan

Governor Newsom appointed Jason Goldman, Gillian Hadfield, Alondra Nelson, and Rob Reich to work with the Government Operations Agency and Cal OES on the recommendations ordered by Executive Order N-9-26: independent verification organizations embedded in frontier labs, verified safety frameworks, an emergency shutoff whose efficacy is checked on an ongoing basis, and updated critical-incident definitions. The recommendations are due November 16. All six AI bills then on his desk, SB 1000, SB 947, AB 1609, AB 1979, AB 2713, and AB 1331, were signed by September 30.

September 18, 2026
Governor of California

Executive Order N-9-26 puts a frontier-model kill switch back on the table

The order asks experts to deliver by November 16 a plan for onsite verification at frontier labs, a verified emergency shutoff, and loss-of-control incident reporting, two years after the governor vetoed a shutdown mandate in SB 1047.

September 16, 2026
Governor of California

California requires disclosure of AI performers in ads

SB 1050 makes it false advertising to run a video or audio ad featuring a synthetic performer without a clear and conspicuous disclosure. It takes effect January 1, 2027 and reaches audio-only ads, which New York's law, in effect since June 2026, exempts.

January 1, 2026
King & Spalding

A wave of US state AI laws takes effect: California, Texas, Illinois

California's frontier transparency and training-data laws, Texas TRAIGA, and Illinois' AI employment amendment all took effect on the same day, three weeks after the federal preemption order. For now every one of them remains enforceable, and most follow the affected resident rather than the company's location.

Common questions

Does California have a comprehensive AI law?
Not in one statute. California has passed more AI-specific laws than any other US state. It has no single AI act; instead it layers targeted statutes. The frontier-model and training-data transparency laws have applied since January 1, 2026, the AI Transparency Act's disclosure duties since August 2, 2026, and separate rules govern companion chatbots. In September 2026 the governor signed an AI auditor framework, Adam's Law on companion chatbots, a disclosure rule for synthetic performers in ads, a customer-service chatbot law on September 28, and then, on September 30, a package covering automated decisions in employment, workplace surveillance, health-care AI, digital replicas, and an expansion of the Transparency Act to every public generative AI system (the only part in force the same day). He also ordered a plan for frontier-model oversight, and the privacy agency's rules on automated decisionmaking technology bind businesses that use it for significant decisions from January 1, 2027. Most of these laws carry meaningful penalties and reach any covered provider serving California users.
What are the penalties for AI violations in California?
Vary by statute. The AI Transparency Act carries a $5,000 per-violation civil penalty, each day a separate violation, and SB 1000 added, until January 1, 2029, a $50,000 per-violation penalty for falsely representing that a system is designed primarily as assistive technology; the frontier act is enforced by the Attorney General. AB 1609 carries up to $5,000 for a first violation and $10,000 for each later one; SB 947, AB 1331, and AB 1883 up to $500 per violation; health-care AI violations run through the Medical Board and licensing boards. The CCPA rules on automated decisionmaking technology are enforced by the California Privacy Protection Agency and the attorney general.
Who does AI regulation in California apply to?
Covered providers and platforms serving California users. Since September 30, 2026 the AI Transparency Act reaches every generative AI system that is publicly accessible in the state, with no user threshold; the frontier laws use a compute threshold; AB 1609 applies to businesses above $500 million in revenue; the 2027 employment, surveillance, and health-care rules reach employers, health-care facilities, chatbot operators, and developers and deployers of clinical decision support systems. The privacy agency's ADMT rules reach businesses subject to the CCPA that use automated decisionmaking technology for significant decisions.
Cite this page

Artificial Intelligence Regulations, "AI Regulation in California," reviewed October 26, 2026, https://artificialintelligenceregulations.com/jurisdictions/california.html.

Entries state the position as of the review date and link to the primary text for verification.