# California AB 2013: Generative artificial intelligence: training data transparency (Chapter 817, Statutes of 2024)

- **Record type**: Policy instrument
- **Jurisdiction**: California (United States)
- **Instrument type**: Act / statute
- **Status**: In force
- **Binding**: Yes
- **Issuing body**: California State Legislature
- **Adopted**: 2024-09-28
- **In force**: 2025-01-01
- **Applies from**: 2026-01-01

## In brief

The California training-data transparency law (AB 2013) is a binding act of California (United States), issued by California State Legislature. It has been in force since 1 January 2025; its first obligations applied from 1 January 2026. Every record here links to its official source and states its verification status.

## Summary

Developers of generative AI systems made available to Californians must post documentation of the data used to train them on their websites, including summaries of the datasets, whether they include copyrighted material, whether they were purchased or licensed, and whether they include personal information.

## Scope

Generative AI systems or services released on or after 1 January 2022 and made available to Californians; certain security, aircraft and national-security systems are exempt.

## Who it applies to

Developers of generative AI systems and services offered to people in California.

## Key dates

Chaptered 28 September 2024; effective 1 January 2025; documentation due by 1 January 2026.

## Notes on dates

Dates as stated in search extracts of the official source; confirm against it.

## Provenance

- **Permanent id**: AIPT-POL-0206 (https://aipolicytracker.org/id/AIPT-POL-0206; never changes or gets reused)
- **Record page**: https://aipolicytracker.org/policies/us-california-ab-2013-training-data-transparency
- **Official source**: https://leginfo.legislature.ca.gov/faces/billStatusClient.xhtml?bill_id=202320240AB2013
- **Source document**: California Legislative Information: AB 2013 (2023-2024) status
- **Published by**: California Legislative Information
- **Review status**: pending review
- **Confidence**: medium
- **Facts last confirmed**: never confirmed against the official source
- **Retrieved**: 2026-10-21
- **Licence**: https://creativecommons.org/licenses/by/4.0/
- **Cite as**: AIPolicyTracker (2026). "California AB 2013: Generative artificial intelligence: training data transparency (Chapter 817, Statutes of 2024)" [AIPT-POL-0206, record version 1, not yet verified]. https://aipolicytracker.org/id/AIPT-POL-0206 (accessed 21 October 2026).

> This record is a structured summary with a link to the official text. It is not legal advice. Open the official source before relying on any date or duty. How current each record type must be is published at https://aipolicytracker.org/verification; what a record must carry at all is published at https://aipolicytracker.org/coverage.