Nothing contained in this title shall require any change in the plans, construction, alteration, or designated use of a structure for which a building permit has been legally issued and construction commenced prior to the adoption of the ordinance codified in this chapter and subsequent amendments thereto; except that if the designated use will be nonconforming it shall, for the purposes of this chapter, be a discontinued use if not in operation within two years of the date of issuance of the building permit.
(Ord. 778 § 2 (Exh. A), 2017)