27 C.F.R. § 53.176 Supporting evidence required in case of price readjustments.
Title 27 - Alcohol, Tobacco Products and Firearms
No credit or refund of an overpayment arising by reason of a price readjustment described in §53.174 or §53.175 shall be allowed unless the manufacturer who paid the tax submits a statement, supported by sufficient available evidence: (a) Describing the circumstances which gave rise to the price readjustment, (b) Identifying the article in respect of which the price readjustment was allowed, (c) Showing the price at which the article was sold, the amount of tax paid in respect of the article, and the date on which the tax was paid, (d) Giving the name and address of the purchaser to whom the article was sold, and (e) Showing the amount repaid to the purchaser or credited to the purchaser's account.
Title 27: Alcohol, Tobacco and Firearms
PART 53—MANUFACTURERS EXCISE TAXES—FIREARMS AND AMMUNITION
Subpart L—Refunds and Other Administrative Provisions of Special Application to Manufacturers Taxes
§ 53.176 Supporting evidence required in case of price readjustments.

