Cal. Bus. & Prof. Code § 4523
A plea or verdict of guilty or a conviction following a plea of nolo contendere made to a charge substantially related to the qualifications, functions, and duties of a psychiatric technician is deemed to be a conviction within the meaning of this article. The board may order the license suspended or revoked or may decline to issue a license, when the time for appeal has lapsed, or the judgment or conviction has been affirmed on appeal or when an order granting probation is made suspending the imposition of sentence, irrespective of a subsequent order under the provisions of Section 1203.4 of the Penal Code allowing the person to withdraw the plea of guilty and to enter a plea of not guilty, or setting aside the verdict of guilty, or dismissing the accusation, information, or indictment.
Ca. Bus. and Prof. Code § 4523