Wash. Rev. Code § 23.100.1309
(1) A domestic limited cooperative association may become a party to a merger under this section and RCW 23.100.1308 and 23.100.1310 through 23.100.1313 by approving a plan of merger. The plan must be in a record and contain:
(d) If the surviving cooperative association exists before the merger, any proposed amendments to:
(e) If the surviving cooperative association is to be created in the merger:
[ 2019 c 37 s 1309.]