805 ILCS 405/4
This Act shall in no way affect or apply to any corporation, limited liability company, limited partnership, or limited liability partnership duly organized under the laws of this State, or any corporation, limited liability company, limited partnership, or limited liability partnership organized under the laws of any other State and lawfully doing business in this State, nor shall this Act be deemed or construed to prevent the lawful use of a partnership name or designation, provided that such partnership shall include the true, real name of such person or persons transacting said business or partnership nor shall it be construed as in any way affecting subdivision (a)(8) or subsection (c) of Section 17-2 of the Criminal Code of 2012. This Act shall in no way affect or apply to testamentary or other express trusts where the business is carried on in the name of the trust and such trust is created by will or other instrument in writing under which title to the trust property is vested in a designated trustee or trustees for the use and benefit of the cestuis que trustent.
805 ILCS 405/4