30 ILCS 605/1.02
"Property" means State owned property and includes all real estate, with the exception of rights of way for State water resource and highway improvements, traffic signs and traffic signals, and with the exception of common school property; and all tangible personal property with the exception of properties specifically exempted by the administrator, provided that any property originally classified as real property which has been detached from its structure shall be classified as personal property.
"Property" does not include property owned by the Illinois Medical District Commission and leased or occupied by others for purposes permitted under the Illinois Medical District Act. "Property" also does not include property owned and held by the Illinois Medical District Commission for redevelopment.
"Property" does not include property described under Section 5 of Public Act 92-371 with respect to depositing the net proceeds from the sale or exchange of the property as provided in Section 10 of that Act.
"Property" does not include that property described under Section 5 of Public Act 94-405 .
"Property" does not include real property owned or operated by the Illinois Power Agency or any electricity generated on that real property or by the Agency. For purposes of this subsection only, "real property" includes any interest in land, all buildings and improvements located thereon, and all fixtures and equipment used or designed for the production and transmission of electricity located thereon.
30 ILCS 605/1.02