Bidders must complete all general questions, all line item questions identified as "Respond to. The Bidding Requirements consist of the Invitation to Bid, Instructions to Bidders,.Bidder must provide one (1) copy of the Proposal form. Bidder must only submit bid information in the designated areas of the Proposal form. The bidder must use the checklist during subcontractor bid solicitation to document the efforts the bidder made. Contractors wanting to bid on items included in a particular letting must submit the properly completed "Request for. Each invitiation to bid is posted on our website and can be found under the section titled "Current Solicitations". Hennepin South Complete Streets Checklist.