240 ILCS 5/6

If applicant is an unincorporated entity of any type, a partnership or sole proprietorship, and the business name or title used is such as to require registration of such name or title under "An Act in relation to the use of an assumed name and the conduct or transaction of business in this State", approved July 17, 1941, the date of and the county in which the required filing was effected shall be stated.