48 C.F.R. § 215.371-1

It is DoD policy, if only one offer is received in response to a competitive solicitation—

(a) To take the required actions to promote competition (see 215.371-2); and

(b) To ensure that the price is fair and reasonable (see 215.371-3) and to comply with the statutory requirement for certified cost or pricing data (see FAR 15.403-4).