Mont. Code Ann. § 16-10-201

When one wholesaler sells cigarettes to any other wholesaler, the former may not be required to include in the selling price to the latter the cost to the wholesaler, as provided by 16-10-103, except that no such sale may be made at a price less than the basic cost of cigarettes, as defined in 16-10-103, but the latter wholesaler, upon resale to a retailer, is considered to be the wholesaler governed by the provisions of 16-10-103 (5).