Where a rear or side yard abuts a street, fences otherwise permitted in side or rear yards shall not extend into required yards, provided however, that this provision shall not prohibit permitted rail or split rail fences erected in such side or rear yards parallel to and not nearer than one foot to the side or rear property line, at a height not to exceed three feet above the natural grade. (Ord. 29-77. Passed 9-13-77.)