Hawaii Organic Act § 25

That each house may punish by fine, or by imprisonment not exceeding thirty days, any person not a member of either house who shall be guilty of disrespect of such house by any disorderly or contemptuous behavior in its presence or that of any committee thereof; or who shall, on account of the exercise of any legislative function, threaten harm to the body or estate of any of the members of such house; or who shall assault, arrest, or detain any witness or other person ordered to attend such house, on his way going to or returning therefrom; or who shall rescue any person arrested by order of such house.

But the person charged with the offense shall be informed, in writing, of the charge made against him, and have an opportunity to present evidence and be heard in his own defense.