If it is determined that the computed total taxable value of any property exceeds its full cash value, the State Board of Equalization will or a county board of equalization shall instruct the county assessor to annually deduct the percentage of obsolescence fixed by the board from the computed total taxable value of the improvements until the property is physically reappraised.
Nev. Admin. Code § 361.641
NRS 361.340, 361.375