Wash. Rev. Code § 11.125.240
(1) An agent under a power of attorney may, subject to the requirements of RCW 11.125.140, and in particular RCW 11.125.140(2)(f), do the following on behalf of the principal or with the principal's property only if the power of attorney expressly grants the agent the authority and exercise of the authority is not otherwise prohibited by another agreement or instrument to which the authority or property is subject:
[ 2016 c 209 s 201.]