Requests For Proposal. To access the selected RFP, please complete the RFP Form.A Request for Proposal (RFP) is the appropriate competitive selection process for purchasing goods or services when price is not the most important criteria. ISBE does not fund entities in the city of Chicago. Forward submittals in sealed envelopes clearly marked with the bid number, the name of the bid, and the date and time of the scheduled opening. FOR NEW VENDORS: If your business is registered in the Illinois Procurement Gateway (IPG), an account has been created for you in BidBuy. And is charged with registering voters and conducting all elections in the City of Chicago. On the advertised due date. Award of City Procurements. RTA conducts formal bidding through public advertisement.