Nothing contained in this chapter shall require any change in the plans, construction, alteration or designated use of a building for which a building permit has been issued and construction work has commenced prior to the adoption of this chapter; except that, if the designated use will be non- conforming it shall, for the purpose of § 11-603 of this article, be a discontinued use if not in operation within two years of the date of issuance of the building permit.
(2005 Code, § 11-607)