45 CFR § 264.40
What happens if a State does not repay a Federal loan?
April 14, 2021
(a) If a State fails to repay the amount of principal and interest due at any point under a loan agreement developed pursuant to section 406 of the Act:
(1) The entire outstanding loan balance, plus all accumulated interest, becomes due and payable immediately; and
(2) We will reduce the SFAG payable for the immediately succeeding fiscal year quarter by the outstanding loan amount plus interest.
(b) Neither the reasonable cause provisions at §262.5 of this chapter nor the corrective compliance plan provisions at §262.6 of this chapter apply when a State fails to repay a Federal loan.