Mont. Code § 67-2-502
The department may hold investigations, inquiries, and hearings concerning matters covered by this title, by its orders and rules, and concerning accidents in aeronautics within this state. An officer or employee of the department designated to hold an investigation or hearing may administer oaths and affirmations; certify official acts; issue subpoenas; and compel the attendance and testimony of witnesses and the production of papers, books, and documents. In case of failure to comply with a subpoena or order issued under this title, the department may invoke the aid of a state court of general jurisdiction. The court may then order the witness to comply with the requirements of the subpoena or order or to give evidence pertaining to the matter in question. A failure to obey the order of the court may be punished as a contempt.
§ 67-2-502, MCA