Learn about the process of Request for Proposals (RFP) and Request for Qualifications (RFQ). You can view all open solicitations.All instructions in the RFP must be adhered to. DUE DATE: Proposals due on or before p.m. Eastern. Time (ET), March 29, 2022 at the School Board Administration. Building. This section shall apply to all contracts for public improvements and purchase of all supplies, materials and services other than professional services. It is the policy of this County to promote diversity in the use of Subcontractors on Miami-Dade County projects and to allow opportunities for subcontracting.