Mont. Code Ann. § 15-23-802 — Metal Mines -- Ad Valorem Taxation -- Reports And Sampling

15-23-802 . Metal mines -- ad valorem taxation -- reports and sampling. (1) Each person mining or extracting gold, silver, copper, lead, or other metals from any mine or mining property located within this state must, on or before March 31 each year, file with the department of revenue a statement of the gross metal yield from each mine or mining property owned or worked by such person in the preceding calendar year and the value thereof. The statement shall be in the form prescribed by the department and shall contain the following:
(a) the name, address, and telephone number of the owner, lessee, or operator of the mine or mining property;
(b) the mine's location by county and legal description;
(c) the number of tons of ore, concentrate, or other mineral products or deposits extracted from the mine or mining property during the period covered by the statement;
(d) the name and location of the smelter, mill, or reduction works to which such ore, concentrate, or other mineral products or deposits have been shipped or sold during the period covered by the statement;
(e) the gross yield of such ores, concentrates, mineral products, or deposits in constituents of commercial value; that is, the number of ounces of gold or silver, pounds of copper, lead, or zinc, or other commercially valuable constituents of such ores, concentrates, or mineral products or deposits, measured by standard units of measurement, during the period covered by the statement;
(f) the gross value of product in dollars and cents; and
(g) any other information requested by the department.
(2) This section applies regardless of the location of any smelter, mill, or reduction works to which the ore, concentrate, or other mineral products or deposits are shipped.
(3) Any sampling, testing, or assaying made necessary to comply with this section must be completed within this state and prior to any mixture of the ore or concentrate to be assayed with ore or concentrate from any other mine or mining property.