Governor Gavin Newsom signed SB 1050 on September 16 at SAG-AFTRA’s Los Angeles headquarters, giving California’s false-advertising code a new hook aimed squarely at generative-AI performers. The law takes effect January 1, 2027.

The venue tells you most of what you need to know about the political coalition behind the bill. This is a labor-flavored win dressed as a consumer-protection statute, which is why the enforcement mechanics matter more than the ceremony.

Structurally, SB 1050 adds Section 17610 to the Business and Professions Code and routes violations through Section 17500 (misdemeanor false advertising) and Section 17200 (the Unfair Competition Law). Coverage extends to video and audio ads that prominently feature a generative-AI figure or voice creating a realistic impression of a human performance where no identifiable real person is depicted. Radio, streaming audio, and podcast reads are in scope, and a spoken tag is required.

Per Progressive Robot’s read of the statute, the disclosure must be substantially similar to “this performance features a synthetic performer” or “no human performer is depicted.” Newsom’s signing window opened earlier this month after 24 AI bills landed on his desk; this one made the cut.

California is the second state to legislate here, following New York’s law that took effect June 9, 2026. The consequential divergence: California omitted New York’s actual-knowledge qualifier. Advertisers can’t plead ignorance of what a stock vendor or agency handed them, which shifts the compliance work into contract warranties rather than creative review.

The enrolled bill text also implies the real enforcement risk isn’t fines. Section 17200 gives public prosecutors injunctive relief, the ability to pull a campaign mid-flight, which is what any brand running paid media into California actually fears.

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