30 ILCS 605/6.01
A master record of all items of real property, including a description of buildings and improvements thereon, shall be maintained by the administrator. Each responsible officer shall each month report to the administrator on forms furnished by the latter on all changes, additions, deletions and other transactions affecting the master record of real property maintained by the administrator. The reports shall include all fixtures which have become personal property because of detachment from buildings or structures during the month preceding, and any other information required by the administrator. The reports required by this Section may, in the discretion of the administrator and the responsible officer, be destroyed after the items listed therein have been recorded on the master record required in this Section.
30 ILCS 605/6.01