30 ILCS 605/6.02
Each responsible officer shall maintain a permanent record of all items of property under his jurisdiction and control, provided the administrator may exempt tangible personal property of nominal value or in the nature of consumable supplies, or both; and provided further that "textbooks" as defined in Section 18-17 of The School Code shall be exempted by the administrator after those textbooks have been on loan pursuant to that Section for a period of 5 years or more. The listing shall include all property being acquired under agreements which are required by the State Comptroller to be capitalized for inclusion in the statewide financial statements. Each responsible officer shall submit a listing of the permanent record at least annually to the administrator in such format as the administrator shall require. The record may be submitted in either hard copy or computer readable form. The administrator may require more frequent submissions when in the opinion of the administrator the agency records are not sufficiently reliable to justify annual submissions.
As used in this Section, "nominal value" means the value of an item is $2,500 or less. For the purposes of this definition, the value of the item shall reflect its depreciated value, as determined by the administrator. The administrator may by rule set the threshold for "nominal value" at a higher amount. Nothing in this definition shall be construed as relieving responsible officers of the duty to reasonably ensure that State property is not subject to theft.
30 ILCS 605/6.02