Mont. Code Ann. § 46-23-303

The board must cause a copy of such order to be published in the newspaper therein designated at least once a week for 2 weeks prior to the hearing and, at the same time, cause to be deposited in the post office at the seat of government, postpaid, a copy of said order and notice addressed to the district judge, county attorney, and sheriff, respectively, of the county where the crime was committed and in like manner mail a copy of the order to the applicant.