Mont. Code Ann. § 35-14-904

A transaction effected under this part does not create or impair a right, duty, or obligation of a person under the laws of this state other than this part relating to a change in control, business combination, control-share acquisition, or a similar transaction involving a domesticating or converting domestic corporation unless the approval of the plan of domestication or conversion is by a vote of the shareholders or the board of directors that would be sufficient to create or impair the right, duty, or obligation directly under that law.