§ 826. Service of summons. (a) Unless the court issues a warrant
pursuant to section eight hundred twenty-seven of this part, service of
a summons and petition shall be made by delivery of a true copy thereof
to the person summoned at least twenty-four hours before the time stated
therein for appearance. If so requested by the respondent, the court
shall not proceed with the hearing or proceeding earlier than three days
after such service.

(b) If after reasonable effort, personal service is not made, the
court may at any stage in the proceedings make an order providing for
substituted service in the manner provided for substituted service in
civil process in courts of record.