California Code, Penal Code - PEN § 1203.4

(a)(1) When a defendant has fulfilled the conditions of probation for the entire period of probation, or has been discharged prior to the termination of the period of probation, or in any other case in which a court, in its discretion and the interest of justice, determines that a defendant should be granted the relief available under this section, the defendant shall, at any time after the termination of the period of probation, if they are not then serving a sentence for an offense, on probation for an offense, or charged with the commission of an offense, be permitted by the court to withdraw their plea of guilty or plea of nolo contendere and enter a plea of not guilty; or, if they have been convicted after a plea of not guilty, the court shall set aside the verdict of guilty; and, in either case, the court shall thereupon dismiss the accusations or information against the defendant and except as noted below, the defendant shall thereafter be released from all penalties and disabilities resulting from the offense of which they have been convicted, except as provided in Section 13555 of the Vehicle Code. The probationer shall be informed, in their probation papers, of this right and privilege and the right, if any, to petition for a certificate of rehabilitation and pardon. The probationer may make the application and change of plea in person or by attorney, or by the probation officer authorized in writing. However, in any subsequent prosecution of the defendant for any other offense, the prior conviction may be pleaded and proved and shall have the same effect as if probation had not been granted or the accusation or information dismissed. The order shall state, and the probationer shall be informed, that the order does not relieve them of the obligation to disclose the conviction in response to any direct question contained in any questionnaire or application for public office, for licensure by any state or local agency, or for contracting with the California State Lottery Commission.

(2) Dismissal of an accusation or information pursuant to this section does not permit a person to own, possess, or have custody or control of a firearm or to prevent conviction under Chapter 2 (commencing with Section 29800) of Division 9 of Title 4 of Part 6.

(3) Dismissal of an accusation or information underlying a conviction pursuant to this section does not permit a person prohibited from holding public office as a result of that conviction to hold public office.

(4) Dismissal of an accusation or information pursuant to this section does not release the defendant from the terms and conditions of an unexpired criminal protective order that has been issued by the court pursuant to paragraph (1) of subdivision (i) of Section 136.2, subdivision (j) of Section 273.5, subdivision (l) of Section 368, or subdivision (k) of Section 646.9. These protective orders shall remain in full effect until expiration or until any further order by the court modifying or terminating the order, despite the dismissal of the underlying accusation or information.

(5) This subdivision shall apply to all applications for relief under this section which are filed on or after November 23, 1970.

(c)(1) Except as provided in paragraph (2), subdivision (a) does not apply to a person who receives a notice to appear or is otherwise charged with a violation of an offense described in subdivisions (a) to (e), inclusive, of Section 12810 of the Vehicle Code.

(2) If a defendant who was convicted of a violation listed in paragraph (1) petitions the court, the court in its discretion and in the interest of justice, may order the relief provided pursuant to subdivision (a) to that defendant.

(e)(1) Relief shall not be granted under this section unless the prosecuting attorney has been given 15 days' notice of the petition for relief. The probation officer shall notify the prosecuting attorney when a petition is filed, pursuant to this section.

(2) It shall be presumed that the prosecuting attorney has received notice if proof of service is filed with the court.