California Code, Business and Professions Code - BPC § 26002

(a) This division does not apply to any product containing cannabinoids that has been approved by the federal Food and Drug Administration that has either been placed on a schedule of the federal Controlled Substances Act other than Schedule I or has been exempted from one or more provisions of that act, and that is intended for prescribed use for the treatment of a medical condition.

(b) This division does not apply to activity performed pursuant to a registration with the United States Drug Enforcement Administration pursuant to Part 1318 (commencing with Section 1318.01) of Chapter 2 of Title 21 of the Code of Federal Regulations, as it read on January 19, 2021, provided that the person engaging in the activity provides the licensing authority valid documentation of their registration with the United States Drug Enforcement Administration and the location where the activity will be performed prior to engaging in the activity.