Wash. Rev. Code § 11.104B.160
(1) A unitrust policy must provide the method for determining the fair market value of an asset for the purpose of determining the unitrust amount, including:
(2) Except as otherwise provided in RCW 11.104B.180(2)(b), a unitrust policy may provide methods for determining the amount of the net fair market value of the trust to take into account in determining the applicable value, including:
(e) Use of:
(f) A limit on how much the applicable value of all assets, groups of assets, or individual assets may increase over:
(g) A limit on how much the applicable value of all assets, groups of assets, or individual assets may decrease below:
[ 2021 c 140 s 2307.]