How do I submit a bid or proposal? All formal bids and proposals shall be submitted as specified in the solicitation document."BID CLOSING" means the date and time set forth in the Solicitation after which no Bid or. Proposal will be considered. 11. Bid Bond: Submit a certified or cashier's check or a surety bond, payable to Northern. Specified in the Contract Documents, complete and ready for final payment,. ENGINEER will make a corresponding final inspection with OWNER and. The City of Maricopa will accept competitive sealed proposals for the playground surface replacement at. The following definitions are used in the RFP: Client or MAG means the Maricopa Association of Governments. Completed documents must be included with the response.