Proposers must complete and return those documents identified in Section 4 Submission of Proposals of the Instructions to Proposers document. DUE IN: The deadline for receipt of sealed Proposals is: December 6, 2023 at PM (Arizona Time). Proposal.Offerors must complete and submit proposals as defined in the Instructions to Offerors, Section 6, Submission of. Proposals. Proposals must be submitted in a sealed envelope. Pima County released a Request for. Qualifications (RFQ) to identify qualified parties for the development of affordable housing on. An RFP is a formal, questionnairestyle document issued to prospective vendors from an organization that intends to buy a product or service.