Applications for special property tax valuation in connection with substantial improvement of historic properties as defined in Chapter 84.26 RCW or as hereafter amended shall be submitted to the board by the county assessor within 10 days of filing. (Ord. 2069 § 2 (Exh. B), 2011; Ord. 1635 § 1, 1996; Ord. 1258 § 1, 1987).