Swiss Civil Procedure Code
(Civil Procedure Code, CPC)

¹ The parties may freely agree on the num­ber of ar­bit­rat­ors. In the ab­sence of an agree­ment, the ar­bit­ral tribunal shall com­prise three mem­bers.

² If the parties have agreed on an even num­ber of ar­bit­rat­ors, it is pre­sumed that an ad­di­tion­al ar­bit­rat­or must be ap­poin­ted as the chair­per­son.