605 ILCS 130/17

The Department may establish a process for prequalification of offerors. If the Department does create such a process, it shall: (i) provide a public notice of the prequalification at least 30 days prior to the date on which applications are due; (ii) set forth requirements and evaluation criteria in order to become prequalified; (iii) determine which offerors that have submitted prequalification applications, if any, meet the requirements and evaluation criteria; and (iv) allow only those offerors that have been prequalified to respond to the request for proposals.