22 CFR §1506.18

Unless waived by the Head of the Agency, USADF will not extend financial assistance in the form of a grant, loan, or loan guarantee to any person delinquent on a non-tax debt owed to a Federal agency. The authority to waive the application of this section may be delegated to the Chief Financial Officer and re-delegated. USADF may also suspend or revoke other privileges for any inexcusable, prolonged or repeated failure of a debtor to pay a claim. Additionally, the Agency may suspend or disqualify any contractor, lender, broker, borrower, grantee or other debtor from doing business with USADF or engaging in programs USADF sponsors or funds if a debtor fails to pay its debts to the Government within a reasonable time. Debtors will be notified before such action is taken and applicable debarment procedures will be used.