410 ILCS 54/55
The Department may, upon its own motion, and shall upon the verified complaint in writing of any person setting forth facts which if proven would constitute grounds for the denial of an application for a certificate of registration, or refusal to renew a certificate of registration, or revocation of a certificate of registration, or suspension of a certificate of registration, investigate the applicant or registrant. The Department, after notice and opportunity for hearing, may deny any application for or suspend or revoke a certificate of registration or may refuse to renew a certificate of registration. Before denying an application or refusing to renew, suspending, or revoking a certificate of registration, the Department shall notify the applicant in writing. The notice shall specify the charges or reasons for the Department's contemplated action. The applicant or registrant must request a hearing within 10 days after receipt of the notice. Failure to request a hearing within 10 days shall constitute a waiver of the right to a hearing.
410 ILCS 54/55