Read the instructions for filling out the form. The Arbitrator should not add "employer" reporting requirements to the Agreement. 19.Agreement. b. The arbitrator shall have the power to determine the existence or validity of a contract of which an arbitration clause forms a part. Fill out the form below to share the job Washington State Takes on the Arbitration of Harassment and Discrimination Claims. The Washington Supreme Court looked to see if there was an agreement between the employee and the pizza company to arbitrate disputes. Washington appellate court has barred employers from entering into arbitration agreements with atwill employees unless they provide additional consideration.