Mont. Code Ann. § 15-7-110

It is in the best interest of the state of Montana to mitigate the fluctuations in market value for class three and class four properties that occur during a 6-year reappraisal cycle. The amendment of 15-7-111 in section 16, Chapter 361, Laws of 2015, mitigates the market's fluctuations in value by implementing a 2-year reappraisal cycle. The intent of the amendments in sections 6 and 7, Chapter 361, Laws of 2015, is for the statewide taxable value for all residential, commercial, industrial, and agricultural property for the reappraisal cycle beginning January 1, 2015, to remain the same as in the reappraisal cycle beginning January 1, 2009, and to adjust the tax rates as needed to accomplish this intent.