(1) The commission has the power to summon witnesses, to administer oaths, and to require the production of records, books, and documents for examination at any hearing or investigation conducted by it. No person shall be excused from attending and testifying, or from producing books, papers, and records before the commission or a court, or from obedience to the subpoena of the commission or a court, on the ground or for the reason that the testimony or evidence, documentary or otherwise, required of him may tend to incriminate him or subject him to a penalty or forfeiture. Nothing in this section shall be construed as requiring any person to produce any books, papers, or records, or to testify in response to any inquiry not pertinent to some question lawfully before the commission or court for determination. No natural person shall be subject to criminal prosecution or to any penalty or forfeiture for or on account of any transaction, matter, or thing concerning which, in spite of his objection, he may be required to testify or produce evidence, documentary or otherwise, before the commission or court, or in obedience to a subpoena; but no person testifying shall be exempted from prosecution and punishment for perjury in the first degree committed in so testifying.

(2) In case of failure or refusal on the part of any person to comply with a subpoena issued by the commission, or in case of the refusal of any witness to testify as to any matter regarding which he may be interrogated, any district court in the state, upon the application of the commission, may issue an order for such person and compel him to comply with such subpoena, and to attend before the commission and produce such records, books, and documents for examination, and to give his testimony. Such court has the power to punish for contempt as in the case of disobedience to a like subpoena issued by the court, or for refusal to testify therein.