Direct source

California’s frontier AI transparency chapter took effect on 1 January 2026

The chaptered statute records an effective date of 1 January 2026.

Evidence explainer

What this establishes

Effective-date language distinguishes enactment in September 2025 from operative duties beginning in January 2026.

Why it matters: It supplies the legal date needed to treat the framework and reporting duties as current California law.

Limits and context: Effective-date text does not itself list every substantive duty; those appear in sections 22757.12 to 22757.15.

Exact passage

Cal. Bus. & Prof. Code § 22757.10 historical note

(Added by Stats. 2025, Ch. 138, Sec. 2. (SB 53) Effective January 1, 2026.)

California Legislative Information Original source

Policy questions

Frontier safety

Should frontier models face mandatory evaluations?

Evaluation language is widespread in policy texts. Thresholds, evaluators and legal consequences remain contested.

Policy asks

in-force

Require large frontier developers to publish catastrophic-risk safety frameworks

Require covered large frontier developers to write, implement, comply with and publish a frontier AI framework covering catastrophic-risk assessment, mitigations and related disclosures.

Policy vehicles

regulation · In force

California SB 53 · Transparency in Frontier Artificial Intelligence Act

Chaptered California statute requiring large frontier developers to publish frontier AI frameworks, transparency reports and critical-incident pathways.

Policy events

2026-01-01 · effective-date

California frontier AI transparency duties take effect

Chapter 25.1 of the Business and Professions Code became effective.