Any action or proceeding in which the validity of the dissolution of an improvement district, or of any of the proceedings in relation thereto, is contested, questioned, or denied shall be commenced within three months from the effective date of the ordinance dissolving the improvement district; otherwise, the dissolution of the improvement district and, all proceedings in relation thereto, shall be held to be valid and in every respect legal and incontestable.
(Added by Stats. 1963, Ch. 156.)