Regulating artificial intelligence training data.

HB 2503 requires developers of commercial generative artificial intelligence systems (like chatbots or image generators) to publicly disclose detailed information about the data used to train their systems by January 1, 2027. This includes sources, dataset types, whether personal or copyrighted data was used, steps taken to remove child sexual abuse material, and if synthetic data was generated. The law applies to developers making systems publicly available in Washington, excluding systems solely for security, aircraft operation, or national defense. Developers must provide this information without compromising trade secrets, and violations are treated as unfair business practices under Washington’s Consumer Protection Act.