No stringing of light bulbs, no animated sign, nor signs that revolve, swing or have movable parts or have flashing lights or reflectors shall be permitted after the effective date of this chapter, except when authorized as a special exception by the Zoning Hearing Board, and no advertising signs, banner, pennant balance, spinners or display constructed of cloth, canvas, wallboard or other like materials shall be erected, suspended or hung on any property except as follows. The Zoning Officer may permit the use of any such advertising signs, banners or displays constructed of cloth, light fabric or other like materials for a period of not more than 30 days in any one calendar year, provided that:
(a) No such sign or display shall exceed in size the area permitted for permanent signs as provided for each zoning district.
(b) No sign shall be placed in such a position that it will cause danger to traffic on a street by obscuring the view.
(c) No such sign or display shall be permitted within the lines of any public street or public sidewalk or shall be closer to a curb than 10 feet, unless specifically authorized by other ordinances and regulations of the Borough of Westmont.
(d) No sign or display shall be permitted to be placed across a public street or highway.