Either the Employer or the Association or both shall notify the arbitrator of his/her selection and upon his/her acceptance shall forward to the arbitrator a copy of the grievance, the employer's answer at Step Three, the Association's notice to the Review Committee as provided for in this section, and a copy of the Agreement. A copy of this communication, except a copy of the Agreement, shall be sent to either the Employer or the Association as the case may be. In the event the arbitrator does not accept his/her selection, the selection process shall be repeated until an arbitrator has accepted selection.