Haw. Rev. Stat. § 440E-23: No rules combat, extreme fighting, or similar contest; prohibited.

No person shall promote, conduct, hold, give, or participate in any no rules combat, extreme fighting, or similar contests. The director shall enforce the prohibition on no rules combat, extreme fighting, or similar contests, and may adopt rules, pursuant to chapter 91, to enforce the prohibition. In addition to any applicable judicial remedy, a person who violates this section shall be subject to the penalties, fines, and other disciplinary provisions of this chapter.