Cal. BPC § 6190.3

The application shall be set for hearing. A copy of the application and notice of the hearing shall be served upon the attorney by personal delivery or, as an alternate method of service, by certified or registered mail, return receipt requested, addressed to the attorney at the latest address shown on the official licensing records of the State Bar. Service is complete at the time of mailing, but any prescribed period of notice and any right or duty to do any act or make any response within that prescribed period or on a date certain after notice is served by mail shall be extended five days if the place of address is within the State of California, 10 days if the place of address is outside the State of California but within the United States, and 20 days if the place of address is outside the United States. If the attorney has a guardian or conservator, copies shall also be served upon such fiduciary in similar manner. If the State Bar is not an applicant, copies shall also be served upon the Office of the Chief Trial Counsel of the State Bar in similar manner at the time of service on the attorney. The court may prescribe additional or alternative methods of service of the application and notice, and may prescribe methods of notifying and serving notices and process upon other persons and entities in cases not specifically provided for herein.