Montana Title 46. Criminal Procedure § 46-4-302. Penalty for failure to appear or obey

(2)(a) A person who, after being granted immunity under 46-4-305, refuses to give testimony or produce evidence under this part must be brought without unnecessary delay before the judge issuing the subpoena or, in that judge's absence or inability to act, before the nearest or most accessible judge, who shall inform the person:

(b) In the presence of the judge, the person must be examined by the prosecutor or produce evidence as commanded in the subpoena.

(c) A refusal to testify or produce evidence may be punished as a contempt under Title 3, chapter 1, part 5.