No fence or wall except a retaining wall, or a wall of a building permitted under the terms of this chapter, over six feet in height shall be erected within any of the open spaces required for this chapter unless that portion of the fence or wall which exceeds six feet in height has a ratio of open area to solid area of at least four to one.
(1995 Code, § 153.155) (Ord. 68-15, passed 8-22-1968) Penalty, see § 153.999