Notwithstanding the preceding provisions of this Part, the owner of any existing non-conforming structure, which is non-conforming by reason of height, is hereby required to permit the installation, operation and maintenance thereof of such markers and lights as shall be deemed necessary by the Lehigh-Northampton Airport Authority to indicate to the operators of aircraft in the vicinity of the Allentown-BethlehemEaston Airport the presence of such airport obstruction. Such markers and lights shall be installed, operated and maintained at the expense of the Lehigh- Northampton Airport Authority.
(Ord. 45, Z-§ 1207, 5/12/76; as amended by Ord. 143, § 2, 10/12/83)