305 ILCS 5/10-3.2
The Illinois Department through its Child and Spouse Support Unit shall enter into agreements with the Secretary of Health and Human Services or his designee under which the services of the federal Parent Locator Service established by the Social Security Act are made available to this State and the Illinois Department for the purpose of locating an absent parent or child when the child has been abducted or otherwise improperly removed or retained from the physical custody of a parent or other person entitled to custody of the child, or in connection with the making or enforcing of a child custody determination in custody proceedings instituted under the Uniform Child Custody Jurisdiction Act or the Uniform Child-Custody Jurisdiction and Enforcement Act, or otherwise in accordance with law. The Illinois Department shall provide general information to the public about the availability and use of the Parent Locator Service in relation to child abduction and custody determination proceedings, shall promptly respond to inquiries made by those parties specified by federal regulations upon receipt of information as to the location of an absent parent or child from the federal Parent Locator Service and shall maintain accurate records as to the number of such inquiries received and processed by the Department.
305 ILCS 5/10-3.2