(a) In case of contumacy by, or refusal to obey a subpoena issued to any person, any court of competent jurisdiction, upon application by the commissioner, may issue to that person an order requiring the person to appear before the commissioner, or the officer designated by the commissioner, there, to produce documentary evidence if so ordered or to give evidence touching the matter under investigation or in question. Any failure to obey the order of the court may be punished by the court as a contempt of court.

(b) No person shall be excused from attending and testifying or from producing any document or record before the commissioner or in obedience to the subpoena of the commissioner or the commissioner’s designee, or in any proceeding instituted by the commissioner, on the ground 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. No individual may be prosecuted or subjected to any penalty or forfeiture for or on account of any transaction, matter or thing concerning which such person is compelled, after claiming privilege against self-incrimination, to testify or produce evidence, documentary or otherwise, except that the individual so testifying shall not be exempt from prosecution and punishment for perjury committed in so testifying.