US · StateCalifornia State Legislature
California SB 942 — California AI Transparency Act (as amended by AB 853)
Requires large generative-AI providers to offer free AI-detection tools and to embed manifest and latent provenance disclosures in AI-generated content. AB 853 amendments pushed the operative date from Jan 1, 2026 to Aug 2, 2026, expressly to align with EU AI Act Article 50 provenance timelines, and extended obligations to large online platforms and GenAI hosting platforms from Jan 1, 2027, and to capture-device makers from Jan 1, 2028.
Enacted Sep 2024; AB 853 (signed Oct 13, 2025) delayed core covered-provider obligations to Aug 2, 2026 and added platform duties from Jan 1, 2027 and capture-device duties from Jan 1, 2028.as of 2025-10-13primary source ↗
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