210 ILCS 115/2.10
"Immobilized mobile home" means a mobile home served by individual utilities, resting on a permanent perimeter foundation which extends below the established frost depth with the wheels, tongue and hitch removed and the home secured in compliance with the Mobile Home Tiedown Act.
(from Ch. 111 1/2, par. 712.10)
(Source: P.A. 85-565.)