Ill. Admin. Code tit. 14, § 120.120
a) If, during the term of an agreement, the taxpayer ceases principal operations at a project location that is the subject of that agreement with the intent to terminate operations in the State, the Department and the Department of Revenue shall recapture from the taxpayer the entire credit amount awarded under the agreement prior to the date the taxpayer ceases operations. [35 ILCS 45/110-70]