48 CFR 12.205: 12.205 Offers.

(a) Where technical information is necessary for evaluation of offers, agencies should, as part of market research, review existing literature generally available in the industry to determine its adequacy for purposes of evaluation. If adequate, contracting officers shall request existing product or service literature from offerors of commercial products or commercial services in lieu of unique technical proposals.

(b) Contracting officers should allow offerors to propose multiple offers that will meet a Government need in response to solicitations for commercial products or commercial services. The contracting officer shall evaluate each offer separately

(c) Consistent with the requirements at 5.203(b), the contracting officer may allow fewer than 30 days response time for receipt of offers for commercial products or commercial services, unless the acquisition is covered by the World Trade Organization Government Procurement Agreement or a Free Trade Agreement (see 5.203(h)).