Its wordings
Arbitration Act
Article 37, paragraph (1)
第三十七条第一項
Each amendment that changed this provision, and each that will, oldest first. Each is shown against the wording just before it; where an amendment gives the provision another number, it is followed under the new one. Read it as it stands today
In force today
An arbitral tribunal which is a panel must appoint a presiding arbitrator, who is to be elected from among the arbitral tribunal members.
合議体である仲裁廷は、仲裁人の互選により、仲裁廷の長である仲裁人を選任しなければならない。