(a) The Zoning Ordinance shall take effect immediately subsequent to its adoption.
(b) Nothing herein contained shall require any change in plans, construction, or designated use of a structure for which a zoning permit has been issued prior to the effective date of the Zoning Ordinance, and the construction of which structure shall have been diligently prosecuted within six months of the date of the permit, and the completion of which structure will take place according to the approved plans within one year following the adoption of the Zoning Ordinance. (12-17-79)