California AI Training Data Transparency Act (AB 2013)
Effective date
Penalty
No explicit penalty provision in statute. Enforceable under California Unfair Competition Law (UCL, Business and Professions Code section 17200), with both A…
Obligations mapped
3 obligations
Overview
Requires developers of generative AI systems or services available to Californians to publish high-level documentation on training data, including sources, types, and curation. Applies retroactively to systems released on or after January 1, 2022. No trade secret exemption. Internal development or material modification of third-party GenAI can be in scope. xAI challenged the law in federal court; on March 4, 2026 the court denied a preliminary injunction, so AB 2013 remains in full effect while litigation continues. Major providers published required documentation by January 1, 2026.
This is an AI-specific state law.
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Who this applies to
This regulation applies to the following roles:
- Developers and vendors of covered AI systems
- Organizations operating in California
This regulation applies to companies that build, develop, or sell AI tools, models, or systems. If your company creates AI products that other businesses or consumers use, this regulation may apply to you.
AB 2013
AI categories covered
- General purpose AI
- Consumer-facing AI
Specific AI use cases:
- Content generation
- Chatbots and virtual assistants
- general llm
What this requires you to do
3 obligations identified from statutory analysis.
Cal. Civ. Code Section 3111(a)
Cal. Civ. Code Section 3111(c)
Cal. Civ. Code Section 3111 (opening paragraph)
Regulation summaries are simplified for readability and may not capture every nuance of the underlying statute. Verify important details against primary sources linked on this page.
Enforcement and penalties
No explicit penalty provision in statute. Enforceable under California Unfair Competition Law (UCL, Business and Professions Code section 17200), with both AG enforcement and private right of action remedies. Private plaintiffs may seek injunctive relief and restitution.
Private right of action: plaintiffs may bring direct claims in addition to government enforcement.
Penalty amounts are based on statutory text and may be subject to adjustment, judicial interpretation, or enforcement discretion.
Legislative history
effective
Court denies xAI preliminary injunction. AB 2013 remains in full force.
challenge filed
xAI files motion for preliminary injunction.
effective
Takes effect.
challenge filed
xAI files federal lawsuit (X.AI LLC v. Bonta, C.D. Cal.) challenging constitutionality.
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California AI regulation guide lists every tracked rule for this jurisdiction with timelines and obligation tallies.
Regulation summaries are simplified for readability and may not capture every nuance of the underlying statute. Verify important details against primary sources linked on this page.