Cal. Business and Professions Code § 4960.5

(a) A person whose license or registration has been revoked, suspended, or surrendered, or who has been placed on probation, may petition the board for reinstatement or modification of penalty, including modification or termination of probation, after a period of not less than the following minimum periods has elapsed from the effective date of the decision ordering that disciplinary action: (1) At least three years for reinstatement of a license revoked or surrendered. (2) At least two years for early termination of probation of three years or more. (3) At least two years for modification of a condition of probation. (4) At least one year for early termination of probation of less than three years. (b) The board may require an examination for that reinstatement. (c) Notwithstanding Section 489, a person whose application for a license or registration has been denied by the board, for violations of Division 1.5 (commencing with Section 475) of this chapter, may reapply to the board for a license or registration only after a period of three years has elapsed from the date of the denial.