Haw. Rev. Stat. § 132-10
The county fire appeals board or the county fire chief shall in all proceedings have the same powers respecting administering oaths, compelling the attendance of witnesses and the production of documentary evidence, and examining witnesses as are possessed by circuit courts. In case of disobedience by any person of any order of the county fire appeals board or the county fire chief or of any subpoena issued by either of them or of the refusal of any witness to testify to any matter regarding which the witness may be questioned lawfully, any circuit judge, on application by the county corporation counsel, shall compel obedience as in case of disobedience of all requirements of a subpoena issued from a circuit court or a refusal to testify therein. The fees and traveling expenses of witnesses shall be the same as are allowed witnesses in the circuit courts and shall be paid by the appropriate county out of any appropriation or funds available for the expenses of the county fire chief.
HRS § 132-10
Rules of Court
Subpoena, see HRCP rule 45.