Its wordings
Arbitration Act
Article 19, paragraph (2)
第十九条第二項
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 an agreement referred to in the preceding paragraph has not been reached, the decision on the challenge of the arbitrator is to be made by the arbitral tribunal, upon the petition of a party.
前項の合意がない場合において、仲裁人の忌避についての決定は、当事者の申立てにより、仲裁廷が行う。