California Code, Probate Code - PROB § 2340

A superior court may not appoint a person to carry out the duties of a professional fiduciary, or permit a person to continue those duties, unless he or she holds a valid, unexpired, unsuspended license as a professional fiduciary under Chapter 6 (commencing with Section 6500) of Division 3 of the Business and Professions Code, is exempt from the definition of “professional fiduciary” under Section 6501 of the Business and Professions Code, or is exempt from the licensing requirements of Section 6530 of the Business and Professions Code.