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 may 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 the person may tend to incriminate the person or subject the person to a penalty or forfeiture; provided, that nothing herein contained may 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 such commission or court for determination. No natural person may be subjected to criminal prosecution or to any penalty or forfeiture for or on account of any transaction, matter, or thing concerning which, in spite of the person’s objection, the person may be required to testify or produce evidence, documentary or otherwise, before the commission or court, or in obedience to its subpoena; provided, that no person testifying may be exempted from prosecution and punishment for perjury committed in so testifying.

2.    In case of failure or refusal on the part of any person to comply with the subpoena issued by the commission, or in case of the refusal of any witness to testify as to any matter regarding which the person may be interrogated, any court in the state, upon the application of the commission, may in termtime or vacation issue an attachment for such person and compel the person to comply with such subpoena, and to attend before the commission and produce such records, books, and documents for examination, and to give the person’s 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.