For commercial or industrial uses abutting a residential district, or an apartment district, landscaping or screening, is required.
   (a)    Such screening shall be a masonry or solid fence between six and seven feet in height, maintained in good condition and free of all advertising and other signs.
   (b)    Landscaping provided in lieu of such wall or fence shall consist of a strip of land not less than ten feet in width, planted with an evergreen hedge or dense planting of evergreen shrubs not less than four feet in height and with not less than fifty percent (50%) opaqueness at the time of planting, to provide one hundred percent (100%) opaqueness within three years and which must be perpetually maintained. (Ord. 164-70. Passed 12-7-71; Ord. 34-95. Passed 6-6-95.)