Ill. Admin. Code tit. 2, § 1000.215
a) Concordia Complex
1301 Concordia Court
P.O. Box 19277
Springfield, Illinois 62794‑9277
Telephone: 217/557-1030
b) State of Illinois Center
100 West Randolph St., Suite 4-200
Chicago, Illinois 60601-3219
Telephone: 312/814-3017