No person shall be excused from attending, testifying, or producing material, books, paper, correspondence, memoranda, and other records before the appeals board or in compliance with a subpoena on the grounds that the testimony or evidence, documentary or otherwise, required of the person may tend to incriminate the person or subject the person to a penalty or forfeiture; provided that no person shall be prosecuted or subjected to any penalty or forfeiture for or on account of any transaction, matter, or thing concerning which the person is compelled, after having claimed the privilege against self-incrimination, to testify or produce evidence, documentary, or otherwise, except that such persons testifying shall not be exempt from prosecution and punishment for perjury committed in testifying.
Pursuant to chapter 91, the appeals board may adopt rules of the Hawaii rules of civil procedure and other rules in conducting any hearing.
HRS § 396-11.5