Washington Revised Code Title 49. Labor Regulations § 49.62.050. Unenforceable provisions

(1) If the covenant requires the employee or independent contractor to adjudicate a noncompetition covenant outside of this state;

(2) To the extent it deprives the employee or independent contractor of the protections or benefits of this chapter; or

(3) If it allows or requires the application of choice of law principles or the substantive law of any jurisdiction other than Washington state.