Nothing contained in this Zoning Code shall require any change in the plans, construction or designated use of a building completed at the time of passage of this Zoning Code (Ordinance 1963-59, passed November 20, 1959), and all amendments thereto, codified herein as Title Six of this Planning and Zoning Code, or for which a permit has been issued before the passage of this Zoning Code, and construction of which is begun within thirty days of the issuance of such permit, diligently prosecuted to its completion and completed according to the plans and descriptions on which the permit was issued, within one year of the issuance of the permit.
(Ord. 1963-59. Passed 11-20-63.)