Cal. Food & Agric. Code § 59285

The director, or the authorized person by whom such lot is being held, shall serve the person in possession of the lot with a notice of noncompliance. Such notice shall be served in person or by mail to the last known address of such person that is in possession. The person in possession shall notify the owner of the lot, or every other person that has an interest in it, of the serving of such notice of noncompliance.