# Generative Artificial Intelligence: Training Data Transparency (AB 2013)

- **Jurisdiction:** California (US-CA)
- **Type:** Law · **Status:** In force · **Binding:** yes
- **Issued by:** California Legislature / Governor
- **Proposed:** — · **Adopted:** 28 Sep 2024 · **Effective:** 1 Jan 2026
- **Obligations:** Copyright and training data, Transparency to users, Data governance
- **Sectors:** All sectors

## Summary
Requires developers of generative AI systems made available to Californians (released or substantially modified since 1 Jan 2022) to post documentation on their websites about training data, including dataset sources, data types, whether copyrighted or personal information is included, and collection periods. Narrow exemptions cover security, aircraft and federal defence systems.

## Why it matters
Every public-facing generative AI provider must maintain a public training-data summary; a federal court refused to block the law in March 2026.

## Source
[California Legislative Information](https://leginfo.legislature.ca.gov/faces/billStatusClient.xhtml?bill_id=202320240AB2013) · [secondary](https://ppc.land/court-denies-xais-bid-to-block-california-ai-training-data-law/)
Checked against the source on 4 Oct 2026. Chapter 817, Statutes of 2024. X.AI LLC v. Bonta (C.D. Cal., No. 2:25-cv-12295): preliminary injunction denied 4 Mar 2026; court found the law likely regulates commercial speech.

## Cite
Generative Artificial Intelligence: Training Data Transparency (AB 2013). California Legislature / Governor. Status: In force. wheresthe.ai, https://wheresthe.ai/rule/us-ca-ab2013-training-data-transparency-2024/ (verified 4 Oct 2026).

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Canonical page: https://wheresthe.ai/rule/us-ca-ab2013-training-data-transparency-2024/ · Not legal advice.