California Code, Vehicle Code - VEH § 23648

(a) Each county shall prepare, or contract to be prepared, an alcohol and drug problem assessment report on each person described in subdivision (b) of Section 23646.

(b) The assessment report shall include, if applicable, a recommendation for any additional treatment and the duration of the treatment. The treatment shall be in addition to the education and counseling program required under Section 11837 of the Health and Safety Code. The assessment report shall be submitted to the court not more than 14 days after the date the assessment was conducted.

(c) Within 30 days of the receipt of the report, the court shall order the person to complete the recommendations set forth in the report in satisfaction of, and consistent with, the terms and conditions of probation. If the court elects not to order the completion of the recommended plan, the court shall specify on the record its reason for not adopting these recommendations.

(d) This section shall become operative on January 1, 2000.