(35 ILCS 145/4) (from Ch. 120, par. 481b.34)
    Sec. 4. Every operator shall keep separate books or records of his business as an operator so as to show the rents and occupancies taxable under this Act separately from his transactions not taxable under this Act. If any operator fails to keep such separate books or records, he shall be liable to tax at the rate designated in Section 3 hereof upon the entire proceeds from his hotel. The Department may adopt rules that establish requirements, including record forms and formats, for records required to be kept and maintained by taxpayers. For purposes of this Section, "records" means all data maintained by the taxpayer, including data on paper, microfilm, microfiche or any type of machine-sensible data compilation.
(Source: P.A. 88-480.)