Ill. Admin. Code tit. 32, § 340.1310
Each specific licensee shall, no less than 30 days before vacating or relinquishing possession or control of premises which may have been contaminated with radioactive material as a result of his activities, notify the Agency in writing of intent to vacate.
(Source: Amended at 29 Ill. Reg. 20841, effective December 16, 2005)