Within 10 days prior to the time set for the first hearing on the petition or order on the commission’s own motion, which time shall be not less than 30 days after the filing of the petition or the making of that order, the secretary 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 provided, 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 party in interest named in the petition or order, the commission shall have full and complete jurisdiction insofar as such petitioner or party in interest is concerned, to make each finding referred to in this chapter, to fix the just compensation to be paid for the acquisition of or damage to any property or interest therein specified in the petition or order, to designate the party or parties to the proceeding who shall pay such compensation and the owner or claimant to whom such compensation shall be paid, and to make its final order of condemnation. The failure to make service upon any person alleging that he is an owner or claimant or party in interest but not named in the petition or order or to acquire jurisdiction over such person shall in no way affect the jurisdiction of the commission over owners and claimants and parties in interest on whom service has been made.