14 C.F.R. § 77.5 Kinds of objects affected.
Title 14 - Aeronautics and Space
This part applies to: (a) Any object of natural growth, terrain, or permanent or temporary construction or alteration, including equipment or materials used therein, and apparatus of a permanent or temporary character; and (b) Alteration of any permanent or temporary existing structure by a change in its height (including appurtenances), or lateral dimensions, including equipment or materials used therein.
Title 14: Aeronautics and Space
PART 77—OBJECTS AFFECTING NAVIGABLE AIRSPACE
Subpart A—General
§ 77.5 Kinds of objects affected.