Wash. Rev. Code § 23.95.510
(1) To register to do business in this state, a foreign entity must deliver a foreign registration statement to the secretary of state for filing. The statement must be executed by the entity and state:
[ 2015 c 176 s 1503.]
Effective date—Contingent effective date—2015 c 176: See note following RCW 23.95.100.