(625 ILCS 5/1-204.3)
    Sec. 1-204.3. Tandem axles. Any 2 or more single axles whose centers are more than 40 inches and not more than 96 inches apart, measured to the nearest inch between extreme axles in the series, except as provided in Section 15-111 for special hauling vehicles.
(Source: P.A. 90-89, eff. 1-1-98.)