7 CFR § 1780.72
Procurement methods
July 6, 2020
Procurement shall be made by one of the following methods and in accordance with requirements of 2 CFR 200.320: Micro-purchases, procurement by small purchase procedures, procurement by sealed bids (formal advertising), procurement by competitive proposals, or procurement by noncompetitive proposals. The sealed bid method is the preferred method for procuring construction.
[81 FR 47689, July 22, 2016]