Washington Revised Code Title 41. Public Employment, Civil Service, and Pensions § 41.56.150. Unfair labor practices for bargaining representative enumerated

(1) To interfere with, restrain, or coerce public employees in the exercise of their rights guaranteed by this chapter;

(2) To induce the public employer to commit an unfair labor practice;

(3) To discriminate against a public employee who has filed an unfair labor practice charge;

(4) To refuse to engage in collective bargaining.