California Code, Business and Professions Code - BPC § 2538.25

(a) The board shall prepare, approve, grade, and conduct examinations of applicants for a hearing aid dispenser license. The board may provide that the preparation and grading of the examination be conducted by a competent person or organization other than the board, provided, however, that the board shall establish the guidelines for the examination and shall approve the actual examination.

(b) Each applicant shall take and pass a written examination and a practical examination compiled at the direction of the board covering the critical tasks involved in the practice of fitting and selling hearing aids and the knowledge, skills, and abilities needed to perform those tasks safely and competently.