Mont. Code Ann. § 25-7-221
25-7-221 Challenges to jurors and the jury
25-7-221 . Challenges to jurors and the jury. (1) Each party may challenge the jury or jurors as follows:
(a) the panel or array;
(b) for cause;
(c) peremptory.
(2) Challenges to individual jurors are for cause or peremptory.