RSA 541-B:10 Powers and Duties of the Board.

I. The board shall have the power to adopt and amend all rules of procedure not inconsistent with the constitution or laws of the state, which reasonably may be necessary for the proper performance of its duties and the regulation of the proceedings before it.
II. The board shall not be bound by common law or statutory rules of evidence, but may admit all testimony having a reasonable probative value. It may exclude evidence which is in the opinion of the board immaterial, irrelevant or unduly repetitious.
III. The board may subpoena witnesses and compel their attendance, and also may require the production of books, papers and documents. Any member of the board may administer oaths or affirmations to witnesses appearing before it. Any person failing or refusing to obey