The appraised value per acre of timberland shall be determined based upon market comparables and shall be estimated by the county assessor. There are at least five (5) various timberland rates based on the timberland classification schedule described in Appendix 1 of this rule. Assessors shall tri-annually review and grade these non-managed timberland properties in order to assign the proper rate per acre to the property. The rate per acre shall be established by the assessor in conformity with requirements of subsection 2.2 of this rule.
W. Va. Code R. § 110-1H-7