Haw. Rev. Stat. § 287-30

Any policy which grants the coverage required for a motor vehicle liability policy may also grant any lawful coverage in excess of or in addition to the coverage specified for a motor vehicle liability policy and the excess or additional coverage shall not be subject to this chapter. With respect to a policy which grants such excess or additional coverage the term "motor vehicle liability policy" shall apply only to that part of the coverage which is required by this chapter.