(a) Contractors debarred, suspended, or proposed for debarment are excluded from receiving contracts, and agencies shall not solicit offers from, award contracts to, or consent to subcontracts with these contractors, unless the agency head determines that there is a compelling reason for such action (see 9.405-1(b), 9.405-2, 9.406-1(c), 9.407-1(d), and 23.506(e)). Contractors debarred, suspended, or proposed for debarment are also excluded from conducting business with the Government as agents or representatives of other contractors.