All dealers are forbidden to expose fireworks in windows where the sun shines through glass on the merchandise displayed, except where such fireworks are in the original package, and all fireworks kept for sale on front counters must remain in original packages; provided, however, that fireworks in open stock may be kept in show cases or in counters out of reach of the public.
425 ILCS 30/8
Known as the Fireworks Regulation Act
The act spans §§ 425-30-1 to 425-30-9 (23 sections).
P.A. 81-623.
Official source: Illinois General Assembly. Reproduced from public-domain Illinois statutes; confirm against the official source for the current text. Not legal advice.