The Department may investigate the actions or qualifications of any person or persons holding or claiming to hold a license. Before suspending, revoking, placing on probationary status, or taking any other disciplinary action as the Department may deem proper with regard to any license, at least 30 days before the date set for the hearing, the Department shall (i) notify the accused in writing of any charges made and the time and place for a hearing on the charges before the Board, (ii) direct him or her to file a written answer to the charges with the Board under oath within 20 days after the service on him or her of the notice, and (iii) inform him or her that if he or she fails to file an answer, default will be taken against him or her and his or her license may be suspended, revoked, placed on probationary status, or other disciplinary action taken with regard to the license, including limiting the scope, nature, or extent of his or her practice, as the Department may deem proper. In case the person, after receiving notice, fails to file an answer, his or her license may, in the discretion of the Department, be suspended, revoked, placed on probationary status, or the Department may take whatever disciplinary action is deemed proper, including limiting the scope, nature, or extent of the person’s practice or the imposition of a fine, without a hearing, if the act or acts charged constitute sufficient grounds for that action under this Act. Written notice may be served by personal delivery or by registered or certified mail to the applicant or licensee at his or her last address of record with the Department. In case the person fails to file an answer after receiving notice, his or her license may, in the discretion of the Department, be suspended, revoked, or placed on probationary status, or the Department may take whatever disciplinary action is deemed proper, including limiting the scope, nature, or extent of the person’s practice or the imposition of a fine, without a hearing, if the act or acts charged constitute sufficient grounds for that action under this Act. The written answer shall be served by personal delivery, certified delivery, or certified or registered mail to the Department. At the time and place fixed in the notice, the Department shall proceed to hear the charges and the parties or their counsel shall be accorded ample opportunity to present statements, testimony, evidence, and argument as may be pertinent to the charges or to the defense thereto. The Department may continue the hearing from time to time. At the discretion of the Secretary after having first received the recommendation of the Board, the accused person’s license may be suspended or revoked, if the evidence constitutes sufficient grounds for that action under this Act.