State-level U.S. rules track EU AI law
California is advancing its own AI regulatory framework, and legal analysis suggests the state's transparency rules closely resemble elements of the EU AI Act, creating the possibility of a common compliance baseline for firms operating on both sides of the Atlantic. That comparison was highlighted in reporting that frames the state rules as materially similar to EU requirements on disclosure and transparency. (english.news.cn)
California is building an artificial intelligence rulebook that increasingly overlaps with Europe’s, especially on telling people when content or interactions come from a machine. (gov.ca.gov) Governor Gavin Newsom signed Senate Bill 53 on September 29, 2025, creating the Transparency in Frontier Artificial Intelligence Act, after California had already signed 17 generative artificial intelligence bills in September 2024. (gov.ca.gov 1) (gov.ca.gov 2) Two earlier California laws form the core of that disclosure push. Assembly Bill 2013 requires developers to post documentation about training data used in generative artificial intelligence systems, and Senate Bill 942 requires large providers to offer detection tools and watermarking options for audiovisual content. (gov.ca.gov) (cooley.com) The European Union’s Artificial Intelligence Act takes a similar approach on transparency. Article 50 requires notice when people interact with certain artificial intelligence systems and requires synthetic content to be marked so it can be identified. (digital-strategy.ec.europa.eu) (eur-lex.europa.eu) That overlap has pushed lawyers and compliance teams to talk about a shared baseline. Morrison Foerster wrote in March 2026 that California’s recent rules “bear a striking resemblance” to European Union transparency obligations and could support globally applicable compliance programs. (mofotech.mofo.com) The timing is converging too. Morrison Foerster said Assembly Bill 853 delayed the California Artificial Intelligence Transparency Act’s operative date from January 1, 2026, to August 2, 2026, matching the date listed for Article 50 transparency obligations under the European Union law. (mofotech.mofo.com) (artificialintelligenceact.eu) California is not copying Europe line by line. The International Association of Privacy Professionals wrote in October 2025 that Senate Bill 53 and the European Union act are both governance frameworks, but “the similarities do not extend much further.” (iapp.org) The state’s approach also grew out of a policy split in Sacramento. Newsom vetoed Senate Bill 1047 in September 2024, then turned to a broader package of disclosure, watermarking, deepfake, and child-safety measures while asking advisers including Fei-Fei Li, Tino Cuéllar, and Jennifer Tour Chayes to help shape guardrails. (cooley.com) (gov.ca.gov) The practical effect is that companies selling generative artificial intelligence tools in California and Europe are being pushed toward the same basic habits: disclose training data, label synthetic media, and tell users when they are dealing with artificial intelligence. (cooley.com) (digital-strategy.ec.europa.eu)
