How do I submit a bid or proposal? All formal bids and proposals shall be submitted as specified in the solicitation document.The bid or Request for Proposal will be designed to be competitively bid following all MCCCD Purchasing guidelines and allowing maximum competition. Maricopa County's Open and Closed Solicitations are posted below. Please register or login to see details of all open opportunities. After contract award, the Contractor shall complete the. Vendor Registration Form accessible from the County Department of Finance. Contract Duration 3 years. Contract Renewal 7 annual renewals. Any request for a fee or rebate offering adjustment must be submitted sixty (60) days prior to the current Contract expiration.