19 C.F.R. § 190.171
(b) Allowance of drawback. Drawback may be granted under 19 U.S.C. 1313(p):
(c) Calculation of drawback. For drawback of finished petroleum derivatives pursuant to section 1313(p), the claimant is required to calculate the total amount of drawback due, for purposes of § 190.51(b), which will not exceed 99 percent of the allowable duties, taxes, and fees, subject to the following:
(3) Federal excise tax. For purposes of drawback of internal revenue tax imposed under Chapters 32 and 38 (with the exception of Subchapter A of Chapter 38) of the Internal Revenue Code of 1986, as amended (IRC), drawback granted on the export of substituted merchandise will be limited to the amount of taxes paid (and not returned by refund, credit, or drawback) on the substituted merchandise.
Effective Date Note:The effective date for amendments regarding the drawback of excise taxes in (c)(3) is Feb. 19, 2019.