# California enacts the Transparency in Frontier Artificial Intelligence Act (SB 53)

- **Record type**: Change log entry
- **Occurred on**: 2025-09-29
- **Jurisdiction**: California (United States)
- **Instrument**: California SB 53: Transparency in Frontier Artificial Intelligence Act
- **Impact level**: High
- **Status after the change**: Adopted

## What changed

The Governor signed SB 53, requiring large frontier developers to publish safety frameworks and transparency reports and to report critical safety incidents, operative 1 January 2026.

## What it means in practice

Frontier-model developers doing business in California need a published safety framework and incident reporting process.

## Provenance

- **Record page**: https://aipolicytracker.org/changes/2025-09-29-california-sb-53-signed
- **Official source**: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260SB53
- **Source document**: SB 53 Transparency in Frontier Artificial Intelligence Act
- **Published by**: California Legislative Information
- **Review status**: pending review
- **Confidence**: medium
- **Facts last confirmed**: never confirmed against the official source
- **Retrieved**: 2026-09-24
- **Licence**: https://creativecommons.org/licenses/by/4.0/

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