Ill. Admin. Code tit. 32, § 422.65
2) The original license document.
c) The licensee shall allow the Agency to perform an audit that was scheduled before the licensee submitted a request to terminate the license.
AGENCY NOTE: Failure to pay the annual fee DOES NOT automatically terminate an Illinois radon license. The Agency must be notified in writing if a license is to be terminated.
(Source: Added at 37 Ill. Reg. 20240, effective December 9, 2013)