110 ILCS 1005/6
The Board may upon its own motion and shall upon the verified complaint in writing of any person setting forth facts which if proved would constitute grounds for revocation as set forth in Section 5, investigate the actions of any person holding or claiming to hold a certificate. The Board shall, before revoking any certificate, at least 10 days prior to the date set for the hearing, notify in writing the holder of the certificate of any charges made and shall afford the accused person an opportunity to be heard in person or by counsel in reference thereto. Such notice may be served by delivery thereof personally to the accused person, or by mailing it by registered mail to the place of business last theretofore specified by the accused person in his last notification to the Board. At the time and place fixed in the notice, the Board shall proceed to hearing of the charges and both the accused person and the complainant shall be accorded ample opportunity to present in person or by counsel, such statements, testimony, evidence and argument as may be pertinent to the charges or to any defense thereto. The Board may continue such hearing from time to time.
110 ILCS 1005/6