Montana Title 25. Civil Procedure § 25-5-301. Appointment of guardian

(1) when the minor is plaintiff, upon the application of the minor if the minor is 14 years of age or, if under that age, upon the application of a relative or friend of the minor;

(2) when the minor is defendant, upon the application of the minor if the minor is 14 years of age and applies within 10 days after the service of the summons or, if under that age or if the minor neglects to apply, upon the application of a relative or friend of the minor or of any other party to the action;

(3) when an insane or incompetent person is party to an action or proceeding, upon the application of a relative or friend of the insane or incompetent person or of any other party to the action or proceeding.