Mont. Code Ann. § 16-3-307
16-3-307 Sale of liquor at less than posted price unlawful
16-3-307 . Sale of liquor at less than posted price unlawful. Except as provided in 16-2-201 , it is unlawful for a licensee under the provisions of this code to resell liquor purchased by the licensee from an agency liquor store for a sum less than the posted price established by the department.