Mont. Code Ann. § 46-30-304

If the accused is not arrested under the governor's warrant of arrest and rendition by the expiration of the time specified in the warrant, bond, or undertaking issued under 46-30-302 and 46-30-303, a judge or magistrate may discharge the accused or may recommit the accused for a further period of 60 days or a supreme court justice or judge of a court of record may again take bail for the accused's appearance and surrender, as provided in 46-30-303, for a period not to exceed 60 days after the date of the new bond or undertaking.