605 ILCS 5/9-110
Current through Public Act 103-1052
Any article, material or process covered by a patent granted by the United States government may be specified and used for constructing or maintaining any public highway if such specifications are drawn so as to provide for an alternative method or methods of construction or maintenance so that competition may be had between different types of materials answering the same general purpose.
605 ILCS 5/9-110