California Code, Business and Professions Code - BPC § 2532.4

(a) The board may direct applicants to be examined for knowledge in whatever theoretical or applied fields in speech-language pathology or audiology it deems appropriate.  It may examine the applicant with regard to their professional skills and their judgment in the utilization of speech-language pathology or audiology techniques and methods.

(b) The examination may be written or oral or both.  The examination shall be given at least once a year at the time and place and under such supervision as the board may determine.  The board shall determine what shall constitute a passing grade.

(c) The board shall keep an accurate recording of any oral examination and keep the recordings as well as any written examination as part of its records for at least two years following the date of examination.