Mont. Code Ann. § 30-12-703

All producers, growers, and shippers of beef, pork, poultry, or lamb in this state are permitted to label each individual portion, piece, or package of beef, pork, poultry, or lamb in a conspicuous place as legibly, indelibly, and permanently as the nature of the commodity will permit, in a manner that indicates to an ultimate purchaser that the product was produced in Montana.