Wash. Rev. Code § 82.08.02665
The tax levied by RCW 82.08.020 does not apply to sales of vessels to residents of foreign countries for use outside of this state, even though delivery is made within this state, but only if (1) the vessel will not be used within this state for more than forty-five days and (2) an appropriate exemption certificate supported by identification as required by the department of revenue and signed by the purchaser or the purchaser's agent establishes the fact that the purchaser is a resident of a foreign country and that the vessel is for use outside of this state. A copy of the exemption certificate is to be retained by the dealer.
As used in this section, "vessel" means every watercraft used or capable of being used as a means of transportation on the water, other than a seaplane.
RCW 82.08.02665
Effective date-1999 c 358 ss 1 and 3-21: See note following RCW 82.04.3651.