Mont. Code Ann. § 15-23-214 — Determination Of Tax -- Payment -- Penalty And Interest

15-23-214 . Determination of tax -- payment -- penalty and interest. (1) Subject to 15-10-420 and on or before the third Monday in October, the department shall compute the tax on railroad car company property by multiplying the taxable value of the property by the average levy.
(2) After determining the tax, the department shall send to the last-known address of each railroad car company subject to taxation a written notice, postage prepaid, showing the amount of taxes due for the current year and any delinquent amount for prior years. The notice must include the taxable value of the property and the average levy used to compute the tax.
(3) The tax is due and payable to the department under the provisions of 15-16-102 . A tax not received by the department within the time requirements of 15-16-102 is delinquent and subject to penalty and interest as provided in 15-1-216 .