California Code, Government Code - GOV § 11502

(a) All hearings of state agencies required to be conducted under this chapter shall be conducted by administrative law judges on the staff of the Office of Administrative Hearings.This subdivision applies to a hearing required to be conducted under this chapter that is conducted under the informal hearing or emergency decision procedure provided in Chapter 4.5 (commencing with Section 11400).

(b) The Director of the Office of Administrative Hearings has power to appoint a staff of administrative law judges for the office as provided in Section 11370.3. Each administrative law judge shall have been admitted to practice law in this state for at least five years immediately preceding his or her appointment and shall possess any additional qualifications established by the State Personnel Board for the particular class of position involved.