1. (a) The department shall use the weighted mean ratio to adjust a municipality’s modified assessed valuation.
2. (b) The department shall use the weighted mean ratio calculated to one tenth of one percent.
3. (c) If the weighted mean ratio does not accurately represent a municipality’s level of assessment, the department shall determine an alternate ratio in accordance with the manual.

4. (d) The criteria for an alternate ratio in (c) above shall be:

   1. (1) The sample of sales does not contain the minimum of 20 valid sales;
   2. (2) An unexplained increase or decrease in the ratio that is more than 10% different than the increases or decreases of the ratios in any of the surrounding municipalities;
   3. (3) An unexplained increase or decrease in the ratio that is more than 10% different than the increases or decreases of the ratios in any other municipalities within the same cooperative or regional school district;
   4. (4) Supplemental data and information provided by the municipality shows that the sample of sales of properties is generally not reflective of the property comprising the municipality’s valuation base;
   5. (5) Data and information provided by the municipality shows the weighted mean ratio is unduly affected by multi-modal assessments in the municipality;

   6. (6) A municipality requests, prior to the calculation of the total equalized valuation, separate assessment ratios by stratum provided that the strata:

      1. a. Contain at least 20 valid sales; and
      2. b. Have a confidence interval, calculated with a 90% confidence level, that is wholly outside the confidence level of other strata;
   7. (7) For (5) and (6) above, the municipality shall have provided accurate assessed value information consistent with the strata category used for the application of separate assessment ratios; and

   8. (8) In applying the separate ratios, a single, weighted overall ratio for the municipality shall be based upon the separate ratios and the total assessed valuation of each strata to adjust:

      1. a. Payments-in-lieu-of taxes, including renewable generation facility property subject to a payment in lieu of taxes agreement under RSA 72:74.
      2. b. Railroad tax monies;
      3. c. Shared revenues;

      4. d. Current use values for a municipality’s equalization ratio; and

         e Compute the municipality’s total equalized evaluation, where applicable.

Source. #8258, eff 1-15-05; ss by #10277, eff 2-22-13; amd by #10815, eff 4-22-15; ss by #13488, eff 11-15-22