305 ILCS 5/10-17.1
The Illinois Department may provide by rule for the administrative registration of a support order entered by a court or administrative body of another state. The purpose of registration shall be to enforce or modify the order in accordance with the provisions of the Uniform Interstate Family Support Act. Upon registration, such support order shall become an administrative order of the Child and Spouse Support Unit by operation of law. The rule shall provide for notice to and an opportunity to be heard by the responsible relative and custodial parent affected, and any final administrative decision rendered by the Department shall be reviewed only under and in accordance with the Administrative Review Law.
Any new or existing support order registered by the Illinois Department under this Section shall be deemed to be a series of judgments against the person obligated to pay support thereunder, each such judgment to be in the amount of each payment or installment of support and each such judgment to be deemed entered as of the date the corresponding payment or installment becomes due under the terms of the support order. Each such judgment shall be enforceable in the same manner as any other judgment in this State. Notwithstanding any other State or local law to the contrary, a lien arises by operation of law against the real and personal property of the noncustodial parent for each installment of overdue support owed by the noncustodial parent.
A one-time charge of 20% is imposable upon the amount of past-due child support owed on July 1, 1988, which has accrued under a support order registered by the Illinois Department under this Section. The charge shall be imposed in accordance with the provisions of Section 10-21 and shall be enforced by the court in a suit filed under Section 10-15.
305 ILCS 5/10-17.1