Haw. Rev. Stat. § 236E-5

(a) It is the intent of this chapter, in addition to the essential purpose of raising revenue, to conform the estate and generation-skipping transfer tax law of the State as closely as possible to the Internal Revenue Code, in order to simplify the filing of returns and minimize the taxpayers' burdens in complying with the estate and generation-skipping transfer tax law. The rules and regulations, forms, and procedures adopted and established under this chapter shall conform as nearly as possible, unless there is good reason to the contrary, to the rules and regulations, forms, and procedures adopted and established under the Internal Revenue Code.

(b) The Internal Revenue Code, so far as made operative by this chapter, is a statute adopted and incorporated by reference. The Internal Revenue Code shall be applied using changes in nomenclature and other language, including the omission of inapplicable language, where necessary to effectuate the intent of this section. References to the following terms in the Internal Revenue Code shall have the following meanings:

"Interest at the underpayment rate" or "interest at the overpayment rate" means the interest rate set forth in section 231-39(b)(4) or section 231-23(d)(1), as the case may be.

"Secretary or his delegate" means the director of taxation or the director's duly authorized subordinates. [L 2012, c 220, pt of §1; am L 2017, c 12, §47]