24 CFR 85.36 (d) 3
(3) Procurement by competitive proposals. The technique of competitive proposals is normally conducted with more than one source submitting an offer, and either a fixed-price or cost reimbursement type contract is awarded. It is generally used when conditions are not appropriate for the use of sealed bids. If this method is used, the following requirements apply:(i) Requests for proposals will be publicized and identify all evaluation factors and their relative importance. Any response to publicized requests for proposals shall be honored to the maximum extent practical;
(ii) Proposals will be solicited from an adequate number of qualified sources;
(iii) Grantees and sub grantees will have a method for conducting technical evaluations of the proposals received and for selecting awardees;
(iv) Awards will be made to the responsible firm whose proposal is most advantageous to the program, with price and other factors considered; and
(v) Grantees and sub grantees may use competitive proposal procedures for qualifications-based procurement of architectural/engineering (A/E) professional services whereby competitors' qualifications are evaluated and the most qualified competitor is selected, subject to negotiation of fair and reasonable compensation. The method, where price is not used as a selection factor, can only be used in procurement of A/E professional services. It cannot be used to purchase other types of services though A/E firms are a potential source to perform the proposed effort.