Wash. Rev. Code § 25.15.251
(1) A transfer, in whole or in part, of a transferable interest:
(4) Except as otherwise provided in (b) of this subsection, a transferee that becomes a member with respect to a transferable interest is liable for the transferor's obligations with respect to the transferable interest. Except to the extent such liabilities are assumed by agreement:
(6) For the purposes of this chapter:
[ 2015 c 188 s 49.]