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California (United States) High at the time Adopted

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

Concerns California SB 53

Verified against the official source 26 Sep 2026 · reviewed by Bhaskar Bhatt (a factual check against the official source, not a legal review or legal advice)
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In brief

California enacts the Transparency in Frontier Artificial Intelligence Act (SB 53). Recorded for California (United States) on 29 September 2025. It concerns the California SB 53. 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. Afterwards the instrument is recorded as adopted.

Date
29 September 2025
Jurisdiction
California (United States)
Instrument
California SB 53
Impact
High
Status afterwards
Adopted
Official source
California Legislative Information

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 does it mean in practice?

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

Official source

SB 53 Transparency in Frontier Artificial Intelligence ActCalifornia Legislative Information · 29 Sep 2025

Cite this record

AIPolicyTracker (2026). “California enacts the Transparency in Frontier Artificial Intelligence Act (SB 53)” [AIPT-CHG-0075, record version 1, verified 26 September 2026 by Bhaskar Bhatt]. https://aipolicytracker.org/id/AIPT-CHG-0075 (accessed 8 November 2026). Data licensed CC BY 4.0.

Permanent id AIPT-CHG-0075: it never changes or gets reused, and its address keeps working if this page moves.

Cite the official text alongside it: SB 53 Transparency in Frontier Artificial Intelligence Act, California Legislative Information, https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260SB53.

BibTeX 
@misc{aipolicytracker2026_californiaenactsthetrans,
  author       = {{AIPolicyTracker}},
  title        = {{California enacts the Transparency in Frontier Artificial Intelligence Act (SB 53)}},
  year         = {2026},
  howpublished = {\url{https://aipolicytracker.org/changes/2025-09-29-california-sb-53-signed}},
  url          = {https://aipolicytracker.org/changes/2025-09-29-california-sb-53-signed},
  urldate      = {2026-11-08},
  note         = {Data licensed CC BY 4.0. Accessed 8 November 2026}
}

Disclaimer: informational only, not legal advice. Verify every claim against the linked official sources and consult a qualified lawyer before acting.