Haw. Rev. Stat. § 89-14
Any controversy concerning prohibited practices may be submitted to the board in the same manner and with the same effect as provided in section 377-9; provided that the board shall have exclusive original jurisdiction over such a controversy except that nothing herein shall preclude (1) the institution of appropriate proceedings in circuit court pursuant to section [89-12(c)] or (2) the judicial review of decisions or orders of the board in prohibited practice controversies in accordance with section 377-9 and chapter 91. All references in section 377-9 to "labor organization" shall include employee organization.
HRS § 89-14
An action concerning prohibited practices may be brought before the board or in a court of competent jurisdiction. 2 H. App. 50,625 P.2d 1046.