(A) Nonconforming uses. Nothing contained in these regulations shall be construed as requiring changes in or interference with the continuance of any nonconforming use of land.
(B) Nonconforming structures. Nothing contained in these regulations shall be construed as to require the removal, lowering, or other change to any existing nonconforming structure including all phases or elements of a multiphase structure the construction of which was begun prior to the effective date of these regulations and is diligently prosecuted.
(C) Nonconforming trees. Nothing in these regulations shall be construed as to require the removal, lowering, or other change to any nonconforming tree. However, any nonconforming tree which grows to a greater height than it was as of the effective date of these regulations is subject to the provisions of these regulations as described in § 90.083 above.
(D) Marking and lighting. Notwithstanding divisions (A) through (C) of this section, the owner of any existing nonconforming structure or tree is required to permit the installation, operation, and maintenance thereon of such markers and lights as shall be deemed necessary by the City Manager to indicate to the operators of aircraft in the vicinity of the airport the presence of such airport obstruction. Such markers and lights shall be installed, operated, and maintained at the expense of the city.
('68 Code, § 3-99) (Ord. 3-1981-5, passed 2-23-81; Am. Ord. 06-2023-39, passed 6-13-23) Penalty, see § 90.999