On November 18, 1999, the Illinois Supreme Court affirmed the appellate court s finding that the sound amplification statute, known as section 12-611 of the Illinois Vehicle Code (625 ILCS 5/12-611 (West 1999)), is an unconstitutional restriction on free speech.

Public Act 91-130 amends 625 ILCS 5/12-201 to require all motor vehicles except motorcycles to ''exhibit at least 2 lighted head lamps ... during the period from sunset to sunrise ...''

Public Act 91-487 creates 625 ILCS 5/11-1304.5, which prohibits parking a motor vehicle with an expired Illinois registration on a public thoroughfare.

On September 28, 1998 the Illinois Environmental Protection Agency adopted 24 amendments and added 16 new subsections to section 276. 35 Ill Adm Code 276.