List of Requests for Qualifications and Requests for Proposals for upcoming Public Works projects. Bids must be opened publicly at the time and place stated in the Invitation for Bid. 4.At least two or more responsible bids must be received. See Proposal Checklist for complete list of Fiscal Attachments. Submit one (1) copy of the Agency's most recent audit including any applicable. CCTA uses PlanetBids for the procurement process. Visit PlanetBids to sign up, download the RFP and other documents, and submit proposals. Register as a bidder online, search for bid requests, order and download documents, bid electronically (where applicable), and much more! Vendors can view bids and submit their offers and proposals electronically using this System.