310 ILCS 60/6

(a) The Tenant Association shall notify the owner in writing, within 90 days after the receipt of the bona fide offer of sale, of its intent to purchase the assisted housing. (b) The owner shall, after receiving a notice pursuant to subsection (a), comply with any reasonable request to make documents available to the Tenant Association, during normal business hours at the owner's principal place of business within 15 days of receiving such a request, including but not limited to: a floor plan of the development; itemized lists of monthly operating expenses, capital expenditures in each of the 2 preceding calendar years and deferred maintenance costs; the amount of project reserves; utility consumption rates; copies of financial and physical inspection reports filed with federal, State or local agencies; the most recent rent roll; a list of tenants; a list of vacant units; and a statement of the vacancy rate at the development for each of the 2 preceding calendar years.