Cal. Ins. Code § 15047

Service shall be made by leaving a copy of the accusation, together with notice of defense and statement to respondent as described in Section 11505 of the Government Code, with a fee of five dollars ($5) for each licensee to be served, in the hands of the presiding officer or in his or her office in Sacramento. That service shall be sufficient service on the licensees subject to compliance with Section 15048.