Cobun Zweifel-Keegan examines California’s newly enacted AI auditor regulations, AB 1405 and SB 813, which establish a registry and oversight framework for independent AI auditors even though the audits themselves remain voluntary. The piece notes that AI companies including OpenAI and Anthropic now support the measures, but what these auditors will actually be required to test remains largely undefined. It compares California’s emerging independent-assessor marketplace to the European Union’s more prescriptive, internally focused conformity-assessment approach.