2 C.F.R. § 1880.220
What contracts and subcontracts, in addition to those listed in 2 CFR 180.220, are covered transactions?
NASA extends coverage of nonprocurement suspension and debarment requirements beyond first-tier procurement contracts under a covered nonprocurement action, to all lower tier subcontracts, at all dollar values, consistent with OMB guidance at 2 CFR 180.220(c) and the figure in the appendix at 2 CFR part 180. NASA does not permit subcontracting to suspended or debarred entities at any tier, at any dollar amount.