Act for Settlement of Labor-Management Disputes Article 34

Meeting of the arbitration committee shall be called by the chief member. When the arbitration committee is organized by three members, the arbitration decision shall be made only when all three members attend the meeting and the majority of the attending members agree. When the arbitration committee is organized by five or seven members, the arbitration decision shall be made only when no less than two-thirds of the members attend the meeting and no less than three-fourths of the attending members agree.If a member fails to attend the meeting twice consecutively, he/she shall be relieved of his/her duty as a member of the arbitration committee, and the competent authority shall designate another member to replace.
中文原文 勞資爭議處理法第34條
仲裁委員會由主任仲裁委員召集,其由委員三人組成者,應有全體委員出席,經出席委員過半數同意,始得作成仲裁判斷;其由委員五人或七人組成者,應有三分之二以上委員出席,經出席委員四分之三以上同意,始得作成仲裁判斷。
仲裁委員連續二次不參加會議,當然解除其仲裁職務,由主管機關另行指定仲裁委員代替之。

English translation for reference only; the Chinese text prevails. Not legal advice.