Mont. Code Ann. § 16-4-1002

It is the intent of this part that retail establishments and manufacturers licensed to sell or serve alcoholic beverages to the public and third-party delivery services licensed to deliver or facilitate the delivery of alcoholic beverages to the public ensure that all licensees, their employees, and independent contractors that sell, serve, or deliver alcoholic beverages are appropriately trained to comply with state law prohibiting the sale, service, or delivery of alcoholic beverages to persons under 21 years of age and to persons who are intoxicated. This part does not apply to special permits issued under 16-4-301.