A motor vehicle, trailer, semitrailer, or pole trailer that is exempt from taxation and registration fees under 15-6-215 or subject to the provisions of 61-3-520 is exempt from all other taxes and fees generally imposed on a motor vehicle, trailer, semitrailer, or pole trailer by this part.
Exemption
Mont. Code Ann. § 61-3-507, under Taxes, Fees, and Fees in Lieu of Taxes.
Mont. Code Ann. § 61-3-507