(410 ILCS 615/3.10) (from Ch. 56 1/2, par. 55-3.10)
Sec. 3.10.
"Dirty egg" means an egg that has a shell that is unbroken and has adhering dirt or foreign material, or prominent stains on the shell surface, or moderate stains covering more than 1/4 of the shell surface.
(Source: P.A. 79-678.)