Mont. Code § 16-11-112
All taxes paid pursuant to 16-11-111 shall be conclusively presumed to be direct taxes on the retail consumer precollected for the purpose of convenience and facility only. The full face value of the insignia or tax shall be added to the cost of the cigarettes and recovered from the ultimate consumer or user. When the tax is paid by any other person, such payment shall be considered as an advance payment and shall be added to the price of the cigarettes and recovered from the ultimate consumer or user. Any person selling cigarettes at retail shall state or separately display in the licensed premises a notice of the tax included in the selling price and charged or payable pursuant to this section. The provisions of this section shall in no way affect the method of collection of such tax.
§ 16-11-112, MCA