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01 / January / 2026 · California · State statute in force

California requires large frontier developers to publish safety frameworks

SB 53, chaptered in September 2025, took effect on 1 January 2026 as Business and Professions Code Chapter 25.1. Covered large frontier developers must publish a frontier AI framework and related transparency reports.

What the record establishes

Finding

A large frontier developer shall write, implement, comply with, and clearly and conspicuously publish on its internet website a frontier AI framework.

Underlying policy record

2026-01-01 · Update

California frontier AI transparency duties take effect

The effective date moved framework publication and related duties from enacted text into operative state law.

Frontier safety

Should frontier models face mandatory evaluations?

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

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

Primary record
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

Coverage comparison

Source mix for this record
Source-type coverage for this recordShare by source type for this intelligence record. Empty groups stay visible.
Coverage gap

Post-effective compliance-practice coverage remains thinner than chaptering and statute-text coverage.

Method

Coverage is grouped by source type and compared with the primary policy record. Missing source groups remain visible rather than being filled by assumption.