48 CFR §1946.704

1. (a)The procurement request initiator is responsible for preparing a written recommendation for those purchases deemed to be appropriate for application of warranty provisions. The recommendation shall state why a warranty is appropriate by specifically addressing the criteria set forth in FAR 46.703. The recommendation shall also identify the specific parts, subassemblies, assemblies, systems, or contract line items to which a warranty should apply.
2. (b)Prior to solicitation of the requirement, the contracting officer shall make a written determination when a warranty provision is to be included.