California Code, Business and Professions Code - BPC § 6543

(a) A person whose license has been revoked or surrendered may petition the bureau for reinstatement or reduction of penalty after a period of not less than one year has elapsed from the effective date of the decision or from the date of the denial of a similar petition.  The director may specify a longer period that must elapse, not to exceed three years, in any decision revoking the license, accepting the surrender of the license due to pending disciplinary action, or denying reinstatement of the license.

(b) A person whose license has not been revoked or surrendered but who has been disciplined by imposition of a suspension or otherwise disciplined may petition the bureau for reinstatement or reduction of penalty after a period of not less than one year has elapsed from the effective date of the decision.

(c) The director shall rule on the petition and impose any terms and conditions that the director reasonably deems appropriate as a condition of reinstatement or reduction of penalty, including, but not limited to, issuing a probationary license or requiring additional continuing education prior to reinstatement.