http://www.ilga.gov/legislation/ilcs/ilcs4.asp?DocName=062500050HCh.+15+Art.+I&ActID=1815&ChapterID=49&SeqStart=152200000&SeqEnd=154400000 said:
625 ILCS 5/15-101) (from Ch. 95 1/2, par. 15-101)
Sec. 15-101. Scope and effect of Chapter 15.
(b) The provisions of this Chapter governing size, weight and load do not apply to fire apparatus or equipment for snow and ice removal operations owned or operated by any governmental body, or to implements of husbandry, as defined in Chapter 1 of this Code, temporarily operated or towed in a combination upon a highway provided such combination does not consist of more than 3 vehicles or, in the case of hauling fresh, perishable fruits or vegetables from farm to the point of first processing, not more than 3 wagons being towed by an implement of husbandry, or to a vehicle operated under the terms of a special permit issued hereunder.