Ill. Admin. Code tit. 14, § 150.430
A proposed corporate name shall comply with the applicable provisions of the Business Corporation Act of 1983 [805 ILCS 5], the General Not For Profit Corporation Act [805 ILCS 105], the Professional Service Corporation Act [805 ILCS 10], the Medical Corporation Act [805 ILCS 15], the Close Corporation Act [805 ILCS 5/Art. 2A], and any other statute of this State which may prohibit or restrict corporate names.
(Source: Amended at 20 Ill. Reg. 7026, effective May 8, 1996)