The regulations of this subchapter shall not apply to any change in an existing structure or to any change in the use of a structure or of land for which a permit was issued prior to effective date of this chapter or any pertinent amendment thereto, provided that the work authorized by such permit is completed within a reasonable time.
(1999 Code, § 40-8-6) (Ord. 5/9/2000-1, passed 5-9-2000)