Generative Artificial Intelligence Training Data Transparency Act (AB 2013)

Cal. Assemb. B. 2013, 2023-2024 Reg. Sess. (chaptered Sept. 28, 2024)

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In force 9 months, effective 1 January 2026.

A text and data mining (TDM) opt-out rule binding public and private bodies.

What this law does

Drafted with AI from the cited sources under the direction of UnGovr staff. UnGovr holds editorial responsibility for this page.

Signed September 28, 2024, this law requires developers of generative AI systems to publish on their websites summaries of training data used, disclosing copyright status, data ownership, and whether personal information or third-party copyrighted content (including news) was included; compliance required by January 1, 2026. The law does not grant publishers an explicit opt-out or compensation right but creates de facto disclosure pressure on AI developers who scraped news content for training.

A December 2025 federal executive order directed review of state AI regulations for conflict with federal policy, creating some enforceability uncertainty.

What it reaches

Instrument type

an act of a legislature

When LexLint raises it

aggregates_content
crawls_web
trains_models

Read the law

California Legislature
Mayer Brown (Sept. 2024); Crowell & Moring; TechCrunch (Oct. 2024)

Every line above is drawn from the primary source linked here, read on the date shown. This is a research summary, not legal advice.

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