Ill. Admin. Code tit. 35, § 887.405
a) The grantee shall maintain books, records, documents, reports and other evidentiary material, using accounting procedures and practices that conform to generally accepted accounting principles and standards, as established by the American Institute of Certified Public Accountants (1211 Avenue of the Americas, New York NY 10036-8775, 212/596-6200) (2001, no later editions or amendments included), to account properly for:
c) The grantee shall preserve records and make records available to the Agency or any authorized representative: