California Code, Vehicle Code - VEH § 41501

(a) After a deposit of bail and bail forfeiture, a plea of guilty or no contest, or a conviction, the court may order a continuance of a proceeding against a person, who receives a notice to appear in court for a violation of a statute relating to the safe operation of a vehicle, in consideration for successful completion of a course of instruction at a licensed school for traffic violators and pursuant to Section 1803.5 or 42005, the court may order that the conviction be held confidential by the department in accordance withSection 1808.7. The court shall notify a person that only one conviction within 18 months will be held confidential.

(b) Subdivision (a) does not apply to a person who receives a notice to appear as to, or is otherwise charged with, a violation of an offense described in subdivisions (a) to (e), inclusive, of Section 12810.

(c) This section shall become operative on July 1, 2011.