625 ILCS 5/7-502
Any person in whose name more than 25 motor vehicles are registered may qualify as a self-insurer by obtaining a certificate of self-insurance issued by the Director of the Department of Insurance as provided in this Section.
The Director may, in his discretion, upon the application of such a person, issue a certificate of self-insurance when he is satisfied that such person is possessed and will continue to be possessed of ability to pay judgment obtained against such person.
Upon not less than 5 days' notice, and a hearing pursuant to such notice, the Director may upon reasonable grounds cancel a certificate of self-insurance. Failure to pay any judgment against any person covered by such certificate of self-insurance and arising out of any crash in which a motor vehicle covered by such certificate of self-insurance has been involved within 30 days after such judgment shall have become final shall constitute a reasonable ground for the cancellation of a certificate of self-insurance.
625 ILCS 5/7-502