Its wordings
Arbitration Act
Article 30, paragraph (2)
第三十条第二項
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 arbitral tribunal determines the languages to be used in the arbitration procedure and the procedures to be carried out by using those languages.
前項の合意がないときは、仲裁廷が、仲裁手続において使用する言語及びその言語を使用して行うべき手続を定める。