35 ILCS 200/11-85
Every railroad company shall, on or before June 1 of each year, when required, make out and file with the Department a statement or schedule showing the property held for right of way, whether owned, leased, or operated under trackage right agreement, and the length of the first, second, third and other main and all side tracks and turnouts, and the number of acres of right of way in each county of this State and in each taxing district of this State, through or into which the road may run. It shall describe all improvements and stations located on the right of way, giving the quantity, quality, character and original cost of each. It shall also report all non-operating personalty owned or controlled by the company on January 1, giving the quantity, quality, character and location of the same. The report shall also include any potential increase in the property's overall valuation that is directly attributable to the investment, improvement, replacement, or expansion of railroad operating property on or after January 1, 2010, through State or federal governmental programs, including cooperative agreements, necessary for higher speed passenger rail transportation through December 31, 2029 . New companies shall make the statement on or before the June 1 after the location of their road.
When the statement has once been made, it is not necessary to report the description as required above unless directed to do so by the Department, but the company shall, on or before June 1, annually, report all additions or changes in its property in this State as have occurred.
The return required by this Section should be made by the using company, but all property which is operated under one control shall be returned as provided in this Section.
35 ILCS 200/11-85