Where proceedings for any improvements and/or acquisitions or any part thereof have been undertaken without compliance with the Investigation Act or without proceedings under Sections 12.84.050 through 12.84.130, proceedings may thereafter be had under Sections 12.84.050 through 12.84.130, with reference thereto, and the order of the Mayor and Common Council determining convenience and necessity therein shall be final and conclusive.
(Ord. 3589, 7-06-76)