Mont. Code Ann. § 87-6-920

A holder of a Montana resident or nonresident fishing or hunting license or camping permit convicted of littering campgrounds, public or private lands, streams, or lakes while hunting, fishing, or camping shall forfeit any current hunting, fishing, or trapping license issued by this state and the privilege to hunt, fish, camp, or trap in this state for a period of 1 year from the date of conviction.