The purpose of this chapter is to enunciate the public policies pertaining to governmental procurement from nongovernmental sources. 22.10 Rejection of bids.The purpose of an invitation to bid is to provide standardized information to all bidders, fostering a truly competitive process. Request for proposal preparation and submission requirements, invitation for bid preparation and submission requirements, purchase order. You can submit bids or proposals to the County even if you are not a registered supplier. The IFB is a competitive bidding process used when specifications can be defined. If you opt to bid, you must register as a buyer. In order to do that, you need to go to login, 'not already a buyer', and register here. TIP: Reference the Due Date and Hour, and RFP number in the lower left corner of the return envelope or package.