27 C.F.R. § 70.91 Interest on erroneous refund recoverable by suit.
Title 27 - Alcohol, Tobacco Products and Firearms
Any portion of an internal revenue tax (or any interest, assessable penalty, additional amount, or addition to tax) which has been erroneously refunded, and which is recoverable by a civil action pursuant to 26 U.S.C. 7405, shall bear interest at the underpayment rate referred to in §70.93 of this part. (26 U.S.C. 6602) [T.D. ATF–301, 55 FR 47614, Nov. 14, 1990]
Title 27: Alcohol, Tobacco and Firearms
PART 70—PROCEDURE AND ADMINISTRATION
Subpart D—Collection of Excise and Special (Occupational) Tax
Interest
§ 70.91 Interest on erroneous refund recoverable by suit.