California AB 2013 Training Data Transparency Law

AB 2013, the Generative Artificial Intelligence Training Data Transparency Act, was enacted in 2024. It requires a developer of a covered generative AI system or service made publicly available to Californians for use to post training-data documentation on its website. The initial posting deadline was January 1, 2026. For a covered system released on or after January 1, 2022, documentation must also be posted before each later public release or substantial modification. The documentation includes a high-level summary of training datasets and information about their sources or owners, purpose, approximate number and types of data points, and collection period. It must address whether datasets include copyrighted, trademarked, patented, personal, or aggregate consumer information; whether they were purchased or licensed; how the developer cleaned or processed them; when they were first used; and whether synthetic data generation was used. The definition of developer includes parties that substantially modify a system for public use. AB 2013 requires dataset-level information, not publication of the raw training corpus or source code. A disclosure does not grant copyright permission, decide fair use, or replace privacy obligations. The act includes exceptions, including systems used solely for security and integrity, systems whose sole purpose is aircraft operation in the national airspace, and systems developed for national-security, military, or defense purposes that are made available only to a federal entity. Read each exception against its exact statutory conditions. Maintain a training-data inventory linked to model versions, fine-tuning runs, synthetic-data generation, and release dates. Assign an owner to prepare and update the public documentation, review sensitive claims, and preserve evidence of what was posted for each covered release. Describe uncertainty rather than inventing dataset provenance. Check the enacted text and current California code for definitions, exceptions, and amendments.