• Check the correct box pertaining to Section 20-160 of the. By completing and signing this Form, the Offeror makes an Offer to the.State of Illinois that the State may accept. A Request for Proposal (RFP) is the appropriate competitive selection process for purchasing goods or services when price is not the most important criteria. Discover the proposal process at Illinois State. Learn about guidelines, deadlines, and how to create your own proposal! FILL OUT the respective RFP attachment below.