Cal. Pub. Util. Code § 1408
Within 10 days prior to the time set for the first hearing on the petition, which time shall be not less than 30 days after the filing of the petition, the executive director of the commission shall serve or cause to be served upon the petitioner a written notice specifying the time and place of the hearing. In all respects not in this chapter otherwise specified, service and the proof of service shall be made as provided by the Code of Civil Procedure. Upon the completion of service upon the petitioner or upon any owner or claimant named in the petition, the commission shall have full and complete jurisdiction over such petitioner, owner, or claimant, with full and complete jurisdiction, insofar as such petitioner, owner, or claimant is concerned, to make each finding referred to in this chapter. The failure to make service upon any person alleging that he is an owner or claimant but not named in the petition shall in no way affect the jurisdiction of the commission over owners and claimants on whom service has been made.
Ca. Pub. Util. Code § 1408