Wash. Admin. Code § 390-17-310
A corporation or business entity is "doing business in Washington state" for purposes of RCW 42.17A.405 if it conducts continuous or substantial activities in Washington state of such character as to give rise to a legal obligation.
In determining whether a corporation or business entity is doing business in Washington state, the commission will take into consideration the following nonexclusive list of indicators:
* Purposefully availing itself of the privilege of conducting business in the state by invoking both benefits and protections of state law.
* Appointing an agent for service of process in Washington state.
* Registering as a corporation in Washington.
* Operating business locations in Washington.
* Hiring employees to work in Washington.
* Purchasing or selling goods or services in Washington.
* Operating an interactive internet web site for the purpose of conducting business.
Wash. Admin. Code § 390-17-310
Statutory Authority: RCW 42.17A.110. 12-03-002, § 390-17-310, filed 1/4/12, effective 2/4/12. Statutory Authority: RCW 42.17.370. 07-07-005, § 390-17-310, filed 3/8/07, effective 4/8/07; 05-04-039, § 390-17-310, filed 1/27/05, effective 2/27/05. Statutory Authority: RCW 42.17.370(1). 96-05-001, § 390-17-310, filed 2/7/96, effective 3/9/96. Statutory Authority: RCW 42.17.370. 93-16-064, § 390-17-310, filed 7/30/93, effective 8/30/93.