Montana Title 3. Judiciary, Courts § 3-15-602. Who constitutes jury

(1) When 11 of the persons summoned as grand jurors who are competent and not excused are present, they constitute the grand jury.

(2) When more than 11 are present, the jury commissioner shall write their names on separate ballots and place the ballots in black capsules. The capsules must be deposited in a box large enough to hold all of the capsules without crowding. The box must be arranged so that the jury commissioner drawing the capsules from the box is unable to see the capsule that the commissioner is about to draw. The jury commissioner shall draw 11 capsules. The persons whose names are on the ballots so drawn shall constitute the grand jury.

(3) When less than 11 are present, the court shall order a sufficient number to be immediately drawn as provided in 3-15-601(2) and summoned to attend the court.