If no proceedings have been brought by the public agency pursuant to this chapter, any interested person may bring an action within the time and in the court specified by Section 860 to determine the validity of such matter. The public agency shall be a defendant and shall be served with the summons and complaint in the action in the manner provided by law for the service of a summons in a civil action. In any such action the summons shall be in the form prescribed in Section 861.1 except that in addition to being directed to “all persons interested in the matter of [specifying the matter],” it shall also be directed to the public agency. If the interested person bringing such action fails to complete the publication and such other notice as may be prescribed by the court in accordance with Section 861 and to file proof thereof in the action within 60 days from the filing of his complaint, the action shall be forthwith dismissed on the motion of the public agency unless good cause for such failure is shown by the interested person.