(A) The building height limitations stipulated in the AO-3 District, shall apply to all structures within this district, including, but not limited to:
(1) Air conditioning units;
(2) Antennae;
(3) Chimneys;
(4) Church steeples;
(5) Communication towers;
(6) Elevator towers;
(7) Flag poles;
(8) Parapet walls;
(9) Silos;
(10) Utility transmission towers;
(11) Windmills;
(12) Similar structures; and
(13) Landscaping.
(B) No structure shall be erected to a height that would encroach into or through any established public or private airport approach plan, prepared in accordance with the criteria established by the Department of Defense and/or the Federal Aviation Administration.