Cal. Bus. & Prof. Code § 8785

(a) A petitioner may petition the board for reinstatement or modification of penalty, including reduction, modification, or termination of probation, after the following minimum periods have elapsed from the effective date of the decision ordering the disciplinary action, or if the order of the board or any portion of it is stayed by a court of law, from the date the disciplinary action is actually implemented in its entirety:
1. (1) Except as otherwise provided in this section, at least three years for reinstatement of a license or certificate that was revoked or surrendered. However, the board may, in its sole discretion, specify in its order of revocation or surrender a lesser period of time that shall be at minimum one year.
2. (2) At least two years for early termination of a probation period of three years or more.
3. (3) At least one year for early termination of a probation period of less than three years.
4. (4) At least one year for reduction or modification of a condition of probation.
(b) The board shall notify the Attorney General of the filing of the petition. The petitioner and the Attorney General shall be given timely notice by letter of the time and place of the hearing on the petition, and the petitioner and the Attorney General shall be given the opportunity to present both oral and documentary evidence and argument to the board. The petitioner shall at all times have the burden of proof to establish by clear and convincing evidence that he or she is entitled to the relief sought in the petition.
(c) The board itself or an administrative law judge, if one is designated by the board, shall hear the petition and shall prepare a written decision setting forth the reasons supporting the decision.
(d) The board may grant or deny the petition or may impose any terms and conditions that it reasonably deems appropriate as a condition of reinstatement or reduction or modification of the penalty.
(e) No petition shall be considered while the petitioner is under sentence for any criminal offense, including any period during which the petitioner is on court-imposed probation or parole. No petition shall be considered while there is an accusation or petition to revoke probation pending against the petitioner.
(f) The board may, in its discretion, deny without hearing or argument any petition that is filed pursuant to this section within a period of two years from the effective date of a prior decision following a hearing under this section.
(g) Judicial review of the board’s decision following a hearing under this section may be sought by way of a petition for writ of administrative mandamus pursuant to Section 1094.5 of the Code of Civil Procedure. The party seeking to overturn the board’s decision shall have the burden of proof in any mandamus proceeding. In the mandamus proceeding, if it is alleged that there has been an abuse of discretion because the board’s findings are not supported by the evidence, abuse of discretion is established if the court determines that the findings are not supported by substantial evidence in light of the whole record.
(h) For the purposes of this section, “petitioner” means a professional land surveyor or licensed civil engineer or a land surveyor-in-training whose license or certificate has been revoked, suspended, or surrendered or placed on probation.