Section 48.6421-6 - Applicable laws(a)Penalties, excessive claims, etc. All provisions of law, including penalties, applicable in respect of the tax imposed by section 4081 shall, to the extent applicable and consistent with section 6421, apply in respect of the payments provided for in section 6421 to the same extent as if these payments were refunds of overpayments of the tax imposed on the sale of gasoline by section 4081. For special rules applicable to the assessment and collection of amounts constituting excessive payments under section 6421, see section 6206 and the regulations thereunder. For the civil penalty assessable in the case of excessive claims under section 6421, see section 6675 and the regulations thereunder. For the treatment as an overpayment of an amount allowable as an excessive credit under section 34 (section 39 of the Internal Revenue Code of 1954 prior to its revision by the Tax Reform Act of 1984) with respect to amounts payable under section 6421, see section 6401(b).(b)Examination of books and witnesses. For the purpose of ascertaining (1) the correctness of any claim made under section 6421 or(2) the correctness of any credit or payment made in respect of the claim, the Commissioner shall have the same authority granted by paragraphs (1), (2), and(3) of section 7602, relating to examination of books and witnesses, as if the person claiming credits or payment under section 6421 were the person liable for tax.T.D. 8043, 50 FR 32042, Aug. 8, 1985