Haw. Rev. Stat. § 463E-8: Witnesses in such proceeding.

In any proceeding related to revocation or suspension of a license issued under this chapter, the board and each member of the board may subpoena, administer oaths to, and examine witnesses on any relevant matter in the proceeding. The person whose license is sought in the proceeding to be revoked or suspended shall be entitled to require the board or any member of the board to subpoena and to administer oaths to any witness or witnesses who presents evidence relevant in the proceeding, and shall be entitled to examine any such witness and any other witness in the proceeding. The circuit court of the circuit in which the proceeding is held may enforce by proper proceeding the attendance and testimony of witnesses in the proceeding.