Mont. Code Ann. § 39-3-305

The department of labor and industry may, upon the written request of the labor department or other corresponding agency of another state or a person, board, officer, or commission of the other state authorized to act for and on behalf of the labor department or corresponding agency, maintain actions in the courts of this state upon assigned claims for wages, judgments, and demands arising in the other state in the same manner and to the same extent that these actions by the department of labor and industry are authorized when arising in this state. However, these actions may be commenced and maintained only in those cases where the other state, by appropriate legislation or by reciprocal agreement, extends a like comity to similar cases arising in this state.