Regulation

California AB 2013 AI Training Data Transparency

state_law, US-CA
Effective: January 1, 2026 Enforced by: California Attorney General

Overview

California AB 2013 requires developers of generative AI systems to publicly disclose detailed information about the data used to train their models. Disclosures must include high-level summaries of training datasets, whether datasets include copyrighted material or personal information, the sources and methods of data collection, the number or volume of data points in training sets, and the time period covered by training data. The law aims to increase transparency around AI training practices, particularly regarding the use of copyrighted works and personal data in model development. Narrow exceptions exist for national security applications and certain trade secret protections.

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