Cal. Food & Agric. Code § 14092

(a) Applicants shall be examined on the requirements of statutes and regulations concerning pesticide use and pest control operations including, but not limited to, knowledge of all of the following: (1) Label directions and restrictions on use. (2) Calibration. (3) Pest control equipment. (4) Pest problems and identification. (5) Worker protection, including protective clothing and equipment. (6) Environmentally sensitive areas.

(b) The examination shall be in written form and shall be prepared by the director and administered by the commissioner, or the director in any county where there is no commissioner. An oral examination may be administered in those situations where, in the opinion of the commissioner, a written examination would not accurately measure the understanding of the applicant.