Mont. Code Ann. § 27-27-101
27-27-101 Definition and function of writ of prohibition
27-27-101 . Definition and function of writ of prohibition. The writ of prohibition is the counterpart of the writ of mandate. It arrests the proceedings of any tribunal, corporation, board, or person exercising judicial functions when such proceedings are without or in excess of the jurisdiction of such tribunal, corporation, board, or person.