Federal Acquisition Regulation
Interest charges
FAR 32.608-1
Unless specified otherwise in the clause at 52.232-17 , Interest, interest charges shall apply to any contract debt unpaid after 30 days from the issuance of a demand unless- (a) The contract is a kind excluded under Contract clause (FAR 32.611) ; or (b) The contract or debt has been exempted from interest charges under agency procedures.
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