CA AB2013: Generative artificial intelligence: training data transparency.

In one paragraph

California's AB 2013 (Civil Code §§ 3110-3111) requires developers of generative AI systems or services made publicly available to Californians, free or paid, to post documentation of their training data on their websites: by January 1, 2026 for systems released since January 1, 2022, and before each later release or substantial modification. The documentation summarizes the datasets, including sources, size, data types, and whether they contain copyrighted material or personal information or were bought or licensed. Signed September 28, 2024 (Chapter 817); took effect January 1, 2025, with first postings due January 1, 2026.

Plain-English summary, written with AI assistance. The official text controls.

What it means for business

Developers of generative AI systems or services offered to the public in California, including government agencies, must post training-data documentation before each new release or substantial modification; the first postings were due January 1, 2026.

Key provisions

1. 1Developer: a person, partnership, state or local government agency or corporation that designs, codes, produces or substantially modifies an AI system or service for use by members of the public (affiliates and hospital medical staff are not the public); training includes testing, validating or fine-tuning
2. 2On or before January 1, 2026, and before each time thereafter that a generative AI system or service, or a substantial modification of one, released on or after January 1, 2022 is made publicly available to Californians (with or without compensation), the developer must post training-data documentation on its website (§ 3111)
3. 3A high-level summary of the datasets: sources or owners; how they further the system's purpose; number of data points (ranges allowed); types of data points; whether they include data protected by copyright, trademark or patent or are entirely public domain; whether they were purchased or licensed
4. 4Also: whether they include personal information or aggregate consumer information (as defined in the CCPA); any cleaning or processing and its purpose; the collection period, noting ongoing collection; when they were first used; and whether synthetic data generation was used
5. 5Exempt: systems whose sole purpose is security and integrity or operating aircraft in the national airspace, and systems developed for national security, military or defense purposes made available only to a federal entity
6. 6The act contains no penalty provision of its own
7. 7A federal court denied xAI's request for a preliminary injunction against the law on March 4, 2026 (X.AI LLC v. Bonta, C.D. Cal. No. 2:25-cv-12295); xAI's appeal (9th Cir. No. 26-1591) is pending
8. 8Signed by the Governor September 28, 2024 (Chapter 817, Statutes of 2024); took effect January 1, 2025, with the first documentation due January 1, 2026

Latest legislative action

Sep 28, 2024. Chaptered by Secretary of State - Chapter 817, Statutes of 2024.

Sponsors

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