Mont. Code Ann. § 87-6-312

A person who hunts, fishes, traps, purchases licenses, or refuses to surrender any current hunting, fishing, or trapping license in violation of 87-6-919 shall be fined not less than $50 or more than $1,000 or be imprisoned in the county detention center for not more than 6 months, or both. In addition, the person, upon conviction or forfeiture of bond or bail may be subject to forfeiture of any current hunting, fishing, or trapping license issued by this state and the privilege to hunt, fish, or trap in this state or to use state lands, as defined in 77-1-101, for recreational purposes for a period of time set by the court.