Its wordings
Arbitration Act
Article 16, paragraph (3)
第十六条第三項
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
If there are three or more parties, and an agreement referred to in paragraph (1) has not been reached, the number of arbitrators is provided by the court, upon the petition of a party.
当事者の数が三人以上である場合において、第一項の合意がないときは、当事者の申立てにより、裁判所が仲裁人の数を定める。