35 Ill. Adm. Code 690.205
Audit and Access to Records
Section 690
Section 690.205 Audit and
Access to Records
a) Each applicant for which a fee is due under this Part shall
preserve and maintain all records relating to calculation of the fee for at
least 5 years after the date on which the permit application is received by the
Agency.
b) The records described in subsection (a) shall be available to
the Agency or its authorized representative (e.g. auditor, contractor) for
examination during normal business hours.