Washington HB 2503 (Regulating artificial intelligence training data.)

Requires developers of generative artificial intelligence systems to publicly document details about the data used to train these systems before making them available to Washingtonians post-January 1, 2027. Outlines specific data documentation requirements, including dataset sources, descriptions, data points, copyright status, and whether synthetic data were used. Exempts developers documenting data for AI systems solely for security, defense, aircraft operation, or systems under the federal food, drug, and cosmetic act. Sets compliance expectations to adhere to the current state of the art, including guidance from national standards, without compromising trade secrets. Designates violations of these requirements as unfair or deceptive acts under Washington's consumer protection act. Does not apply these requirements if subject to existing federal mandates. Establishes provisions as a new chapter in Title 19 RCW.