California SB 53 (Frontier AI Transparency Act)

Jurisdiction:
California
enforcing
Effective:
Jan 1, 2026
Authority:
California Attorney General
Official text Verified Apr 27, 2026

Obligations Covered

Transparency & Disclosure Incident Reporting

Provisions (2)

Frontier AI Framework Publication #

Obligation:
Transparency
enforcing
Effective:
Jan 1, 2026
Risk tier:
general-purpose
Scope:
large frontier developers (annual gross revenue > $500M)

Requirements

RequirementDetails
Publish frontier AI frameworkLFDs must write, implement, and clearly publish a frontier AI framework covering governance structures, catastrophic risk mitigation, cybersecurity practices, and standards alignment (§ 22757.12)
Annual updateFramework must be updated and made public at least annually, and within 30 days of any material modification
Redaction allowanceLFDs may redact trade secrets, cybersecurity practices, or national security items; unredacted versions retained 5 years
Incident reporting to OESTransmit summary of catastrophic risk assessments to California OES (§ 22757.13)
Whistleblower channelEstablish anonymous internal channel for covered employees to report safety concerns

Penalties

ViolationFine
Per violationUp to $1M

Incident Reporting #

Obligation:
Incident Reporting
enforcing
Effective:
Jan 1, 2026
Risk tier:
general-purpose
Scope:
frontier developers (models trained with > 10^26 operations)

Requirements

RequirementDetails
15-day OES reportReport critical safety incidents to OES within 15 days of discovery (§ 22757.13(c)(1))
24-hour imminent-risk reportIf incident poses imminent risk of death or serious injury, disclose within 24 hours to appropriate authority including law enforcement (§ 22757.13(c)(2))
OES public mechanismOES must establish public reporting mechanism for critical safety incidents (§ 22757.13(a))
Catastrophic risk summariesLFDs must confidentially submit catastrophic-risk assessment summaries to OES (§ 22757.13(b))
Whistleblower protectionProtected channels for employees to anonymously report safety concerns to the developer

Penalties

ViolationFine
Per violationUp to $1M