Reg. § 48.6427-4 Applicable laws.

(a) Penalties, excessive claims, etc All provisions of law, including penalties, applicable in respect of the tax imposed by section 4041 shall, to the extent applicable and consistent with section 6427, apply in respect of the payments provided for in section 6427 to the same extent as if these payments constituted refunds of overpayments of the tax imposed on the sale of fuels by section 4041. For special rules applicable to the assessment and collection of amounts constituting excessive payments under section 6427, see section 6206 and the regulations thereunder. For the civil penalty assessable in the case of excessive claims under section 6427, see section 6675 and the regulations thereunder. For the treatment as an overpayment of an amount allowable as an excessive credit under section 34 with respect to amounts payable under section 6427, see section 6401(b).

(b) Examination of books and witnesses For the purpose of ascertaining