730 ILCS 5/5-8A-6
For a sexual predator subject to electronic monitoring under paragraph (7.7) of subsection (a) of Section 3-3-7, the Department of Corrections must use a system that actively monitors and identifies the offender's current location and timely reports or records the offender's presence and that alerts the Department of the offender's presence within a prohibited area described in Section 11-9.3 of the Criminal Code of 2012, in a court order, or as a condition of the offender's parole, mandatory supervised release, or extended mandatory supervised release and the offender's departure from specified geographic limitations. To the extent that he or she is able to do so, which the Department of Corrections by rule shall determine, the offender must pay for the cost of the electronic monitoring. Fines and assessments, such as fees or administrative costs, authorized under this Section shall not be ordered or imposed on a minor subject to Article III, IV, or V of the Juvenile Court Act of 1987, or a minor under the age of 18 transferred to adult court or excluded from juvenile court jurisdiction under Article V of the Juvenile Court Act of 1987, or the minor's parent, guardian, or legal custodian.
730 ILCS 5/5-8A-6