48 C.F.R. § 219.705-4
219.705-4 Reviewing the subcontracting plan.
(d)(i) Challenge any subcontracting plan that does not contain positive goals. A small disadvantaged business goal of less than five percent must be approved one level above the contracting officer.
(ii) The contracting officer may use the checklist at PGI 219.705-4 when reviewing subcontracting plans in accordance with FAR 19.705-4.