Wash. Rev. Code § 30B.53.080
(1) The board of a state trust company, with the director's approval, may cause a state trust company to sell all or substantially all of its assets, including the right to control accounts established with the trust company, without shareholder or participant approval if the director finds:
(2) A sale under this section must include an assumption and promise by the buyer to pay or otherwise discharge:
[ 2014 c 37 s 396.]