# California AI Transparency Act Enforcement Begins: Generative AI Must Disclose AI-Generated Content

> California's AI Transparency Act is now operative, and it puts concrete labeling duties on the companies behind widely used generative tools. The law, SB 942 as amended by AB 853, applies to providers with more than a million monthly users in the state and covers systems that generate images, video, or audio. Those providers must attach disclosures that content was AI-generated, both latent signals machines can detect and user-facing labels people can see, and they must offer a free public tool so anyone can check a file. The goal is to make synthetic media traceable at a moment when convincing fakes are trivial to produce. Rather than banning generation, the state is betting on provenance. If a clip or picture carries a durable marker of its origin, platforms and viewers have a fighting chance of knowing what they are looking at. Enforcement is only the first phase. The rules expand in 2027 and 2028 to pull in large platforms and device makers, and the penalties for noncompliance are steep. California, home to many of the firms it regulates, is again setting a de facto national standard ahead of Washington.

_Section: [Daily AI Updates](https://www.wortins.com/daily-ai) · Source: Morgan Lewis · Published Saturday, August 15, 2026_

## Wortins' read

California's AI Transparency Act is now operative, and it puts concrete labeling duties on the companies behind widely used generative tools. The law, SB 942 as amended by AB 853, applies to providers with more than a million monthly users in the state and covers systems that generate images, video, or audio. Those providers must attach disclosures that content was AI-generated, both latent signals machines can detect and user-facing labels people can see, and they must offer a free public tool so anyone can check a file. The goal is to make synthetic media traceable at a moment when convincing fakes are trivial to produce. Rather than banning generation, the state is betting on provenance. If a clip or picture carries a durable marker of its origin, platforms and viewers have a fighting chance of knowing what they are looking at. Enforcement is only the first phase. The rules expand in 2027 and 2028 to pull in large platforms and device makers, and the penalties for noncompliance are steep. California, home to many of the firms it regulates, is again setting a de facto national standard ahead of Washington.

## Source

[Read the full story at Morgan Lewis](https://www.morganlewis.com/pubs/2026/08/new-california-ai-disclosure-rules-become-operative)

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