Ill. Admin. Code tit. 92, § 3000.1330
b) The presiding officer may:
d) The respondent may appear and be heard on his own behalf or through counsel of his choice. The respondent or his counsel may offer relevant information including testimony which he believes should be considered in defense of the allegations or which may bear on the remedial action being sought and conduct such cross-examination as may be required for a full disclosure of the facts.
(Recodified from 92 Ill. Adm. Code 107 (Department of Transportation) pursuant to P.A. 104-0025, at 49 Ill. Reg. 12509)