California AB 2013: What the Training Data Disclosure Means for Your AI Procurement
California AB 2013 took effect January 1, 2026. The law requires developers of generative AI systems made available to Californians to publish high-level documentation about the data used to train each model, including the source categories, the time period of collection, and whether personal information was included. The procurement team now has a public record to read before signing, and the audit team has a citable artifact for vendor due diligence. This walkthrough covers what the disclosure must contain, what it does not contain, and how the per-decision audit log fits.
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