Law note · California
AI Training Data Transparency Act (AB 2013)
What it asks of an app
- If you develop a generative AI system made available to Californians, publicly post documentation of your training datasets before each release or substantial modification, starting January 1, 2026.
- State whether those datasets include copyrighted, trademarked, or patented data, and whether they include personal information.
- Track this documentation duty against Civ. Code §§ 3110-3111, not the Bus. & Prof. Code citation some sources still use.
When LexLint raises it
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What we found
AB 2013 requires developers of generative AI systems made available to Californians, released or substantially modified since January 1, 2022, to publicly post documentation of their training datasets, including whether the datasets include data protected by copyright, trademark, or patent, and whether they include personal information as defined in Civ. Code § 1798.140. The duty commences January 1, 2026 and repeats before each subsequent release or substantial modification.
The corpus previously carried this instrument's citation as Bus. & Prof. Code §§ 22756.9-22757.1; reading the chaptered bill text directly shows AB 2013 in fact adds Title 15.2 (commencing with Section 3110) to Part 4 of Division 3 of the Civil Code, chaptered September 28, 2024 as Chapter 817, Statutes of 2024, and that correction is reflected here. A federal district court denied a preliminary injunction against enforcement in X.AI LLC v. Bonta (C.D. Cal., Mar.
4, 2026, secondary-sourced), finding no likelihood of success on trade-secret or constitutional claims without reaching the law's ultimate validity, so the law remains in effect subject to that ongoing litigation.