If an arbitration petitioner violates the provisions of Article 31, paragraph (1), the arbitral tribunal must make a decision to end the arbitration procedure; provided, however, that this does not apply to cases in which there are justifiable grounds for that violation.
Even if an arbitration respondent has violated the provisions of Article 31, paragraph (2), the arbitral tribunal must continue the arbitration procedure without treating that violation as being the arbitration respondent's admission of the arbitration petitioner's allegations.
If one party fails to appear on the date of oral hearings or to produce documentary evidence, the arbitral tribunal may make an arbitral award on the evidence collected by that time; provided, however, that this does not apply to cases in which there are justifiable grounds for the party to fail to appear at the oral hearings or to produce documentary evidence.
The provisions of the preceding three paragraphs do not apply if otherwise agreed by the parties.
前三項の規定は、当事者間に別段の合意がある場合には、適用しない。
略称規定第二条第一項
…既に生じた民事上の紛争又は将来において生ずる一定の法律関係（契約に基づくものであるかどうかを問わない。）に関する民事上の紛争の全部又は一部の解決を一人又は二人以上の仲裁人にゆだね、かつ、その判断（以下「仲裁判断」という。）に服する旨の合…
わかりやすく言うと
当事者から解決を任された民事上の紛争について、仲裁人が下す判断のことです。仲裁合意をした当事者は、この判断に従うことを約束しています。
定義第二条第二項・法令全体に適用
仲裁合意に基づき、その対象となる民事上の紛争について審理し、仲裁判断を行う一人の仲裁人又は二人以上の仲裁人の合議体