All retailers are forbidden to expose fireworks where the sun shines through glass on the merchandise displayed, except where such fireworks are in the original packages, and all fireworks kept for sale on front counters must remain in original packages, except where an attendant is on constant duty; provided, however, that fireworks in open stock may be kept in show cases or counters out of reach of the public without an attendant being on duty. Signs reading “FIREWORKS FOR SALE--NO SMOKING ALLOWED” shall be displayed in the section of the store set aside for the sale of fireworks. (Prior code § 2-3-58)