Disability Rights:
SERVICE ANIMALS: A Guide for Illinois Businesses and other Public Accommodations from Attorney General Lisa Madigan's office

 http://www.illinoisattorneygeneral.gov/rights/servanimals.html

SERVICE ANIMALS: A Guide for Illinois Businesses and other Public Accommodations (PDF version)
http://www.ag.state.il.us/publications/pdf/servanimals.pdf

Illinois: Service Dog Central

http://servicedogcentral.org/content/node/13