Section 63-405 - ASSESSMENT OF OPERATING PROPERTY(1) The state tax commission must assess all operating property at a meeting of the commission convening on the second Monday of August in each year, and must complete the assessment of such property on the fourth Monday in August.(2) The state tax commission shall determine the system value and calculate the allocation and apportionment of the system value for all operating property and specifically determine: (a) The number of miles and the value per mile of each railroad in the state and for each taxing district in which such railroad may exist.(b) The number of miles and the value per mile of each telephone corporation in the state and for each taxing district in which such telephone corporation may exist.(c) The number of miles and the value per mile of each pipeline in the state and for each taxing district in which such pipeline may exist.(d) The number of miles and the value per mile of each water company under the jurisdiction of the public utilities commission in the state, and for each taxing district in which such water company may exist. The value per mile of any line included in this subsection, except railroads, shall be determined by dividing the total value of such line within the state by the number of miles of such line within the state. The value per mile of railroad line shall be determined by apportionment of the total value of line within the state. The apportionment shall be based twenty percent (20%) on the ratio of line miles in the state to line miles in the county; forty percent (40%) on the ratio of net ton miles in the state to net ton miles in the county; and forty percent (40%) on the ratio of station revenues in the state to station revenues in the county. All operating property of railroads shall be apportioned to the counties as part of the railroad line in the county. The apportionment for taxing districts shall be the same as the apportionment among counties.(e) The system value, the number of miles and the value per mile of each electric current transmission line and each electric current distribution line in each county separately, and for each taxing district within said county in which such transmission and distribution lines may exist. The value per mile of any line included in this subsection shall be determined by dividing the apportioned value of such line within each county by the number of miles of such line within said county.(f) The system value of private railcar fleets entering or standing in Idaho in the year preceding the constituted lien as provided in section 63-411(3), Idaho Code.(g) The system value and calculate the allocation and apportionment of the system value for all other operating property.(3) On and after January 1, 2004, any newly installed or constructed equipment located within a city corporate limit or within five (5) miles of a city corporate limit and used for and in conjunction with the thermal generation of electricity shall be apportioned based on physical location. For purposes of this subsection newly installed or constructed equipment used for and in conjunction with the thermal generation of electricity shall not include the remodeling, retrofitting, rehabilitation, refurbishing or modification of an existing electrical generation facility, or integration or transformation facilities such as substations or transmission lines. Notwithstanding the provisions of section 63-301A, Idaho Code, property apportioned based on physical location pursuant to this subsection shall be placed on the new construction roll.(4) If the value of property of any company assessable under this section is of such a nature that it cannot reasonably be apportioned on the basis of rail, wire, pipeline mileage, such as microwave and radio relay stations, the tax commission may adopt such other method or basis of apportionment to the county and taxing districts in which the property is situate as may be feasible and proper.[63-405, added 1996, ch. 98, sec. 5, p. 338; am. 1997, ch. 117, sec. 17, p. 317; am. 1998, ch. 400, sec. 3, p. 1252; am. 2004, ch. 105, sec. 1, p. 379; am. 2006, ch. 302, sec. 3, p. 935.]