Montana Title 46. Criminal Procedure § 46-3-111. Place of trial

(1) The place of trial must be in the county where the charge is filed unless otherwise provided by law.

(2) All objections that a charge is filed in the improper county are waived by a defendant unless made before the first witness is sworn at the time of trial. If an objection is made, a hearing must be held and the proper county in which to file the charge must be established before further proceedings may take place.