California frontier AI transparency duties take effect

Business and Professions Code Chapter 25.1 becomes operative. Large frontier developers face framework publication and related reporting duties under the chaptered statute.

Event typeeffective-date

Update to California SB 53 / TFAIA.

What became operative

Fact

The codes annotation records Chapter 25.1 as effective 1 January 2026.

Section 22757.12(a) requires large frontier developers to write, implement, comply with and publish a frontier AI framework for covered frontier models.

What operators must treat as current law

Analysis

From the effective date, the publication and compliance duties are California law for covered developers, separate from any later federal statute.

OES reporting pathways and Attorney General civil penalties sit in the same chapter and travel with the effective date.

Limits

Whether a specific developer is a “large frontier developer” depends on the statutory definitions in § 22757.11, which gate the framework and reporting duties described on the parent vehicle page.

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.

Evidence

Source basis

Direct sourceOpen evidence record

California requires large frontier developers to publish a frontier AI framework

Business and Professions Code section 22757.12(a) requires covered developers to write, implement, comply with and publish a frontier AI framework.

A large frontier developer shall write, implement, comply with, and clearly and conspicuously publish on its internet website a frontier AI framework that applies to the large frontier developer’s frontier models and describes how the large frontier developer approaches all of the following:

California Legislative Information · Cal. Bus. & Prof. Code § 22757.12(a)

Direct sourceOpen evidence record

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

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

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

California Legislative Information · Cal. Bus. & Prof. Code § 22757.10 historical note