155. Each party shall pay for its own expenses. In cases contemplated in Division 1 of this chapter, the arbitrator’s fees and expenses shall be borne by the losing party or the party which withdraws. Where an agreement is reached before the arbitrator delivers his decision, such agreement shall prescribe the sharing of the arbitrator’s fees and expenses by the parties. Where the arbitrator considers his decision or his recommendation to be split, the arbitrator shall determine the proportion in which his fees and expenses shall be paid by each party. In cases contemplated under Division 2 of this chapter, the arbitrator’s fees and expenses shall be paid by the employer.