31 C.F.R. § 203.15 Prohibited debits through the Automated Clearing House.
Title 31 - Money and Finance: Treasury
(a) General. The Treasury has instituted operational safeguards to scrutinize all entries that remove funds from the TGA. In the event funds are removed from the TGA without authority, this section sets forth the liability of financial institutions originating such entries. Accordingly, a financial institution shall not originate an ACH transaction to debit the TGA without the prior written permission of Treasury. Unauthorized entries under this section do not include reversal entries of previously initiated ACH credits authorized in §203.12(d). (b) Liability. A financial institution that originates an unauthorized ACH entry that debits the TGA shall be liable to Treasury for the amount of the transaction and shall be liable for interest charges as specified in paragraph (d) of this section. (c) Authorization to recover principal and assess interest charge. By initiating unauthorized debits to the TGA through the ACH, a financial institution is deemed to authorize the FRB to debit its Federal Reserve account or the account of its designated correspondent financial institution for any principal and, if applicable, an interest charge assessed by Treasury under this section. (d) Interest charge calculation. The interest charge shall be at a rate equal to the Federal funds rate plus two percent. The interest charge shall be assessed for each calendar day from the day the TGA was debited to the day the TGA is recredited with the full amount of principal due.
Title 31: Money and Finance: Treasury
PART 203—PAYMENT OF FEDERAL TAXES AND THE TREASURY TAX AND LOAN PROGRAM
Subpart B—Electronic Federal Tax Payments
§ 203.15 Prohibited debits through the Automated Clearing House.

