Cal. Health and Safety Code § 1394.5

When any person, including any nonresident of this state, engages in conduct prohibited or made actionable by this chapter or any rule, regulation, or order adopted hereunder, whether or not the person has filed a power of attorney under subdivision (j) of Section 1351, and personal jurisdiction over the person cannot otherwise be obtained in this state, that conduct shall be considered equivalent to the appointment of the director or the director’s successor in office to be the attorney in fact to receive any lawful process in any noncriminal suit, action, or proceeding against the person or the person’s successor, executor, or administrator which arises out of that conduct and which is brought under this chapter or any rule, regulation, or order adopted hereunder, with the same force and validity as if personally served. Service may be made by leaving a copy of the process in the office of the director, but it is not effective unless the plaintiff or petitioner, who may be the director in a suit, action, or proceeding instituted by him or her, forthwith sends notice of the service and a copy of the process by registered or certified mail to the defendant or respondent at his or her last known address or takes other steps which are reasonably calculated to give actual notice, and in a court action, an affidavit of compliance with this section is filed in the case on or before the return day of the process, if any, or within such further time as the court allows. In the case of administrative orders issued by the director, the affidavit of compliance need not be filed with the administrative tribunal unless the respondent requests a hearing.