Ill. Admin. Code tit. 74, § 760.950
a) The administrator may waive, in whole or in part, interest under Section 15-1204(a) of the Act and penalties under Section 15-1204(b) [765 ILCS 1026/15-1206(1)].
b) The administrator shall waive a penalty under Section 15-1204(b) of the Act if the administrator determines that the holder acted in good faith and without negligence. [765 ILCS 1026/15-1206(2)]