The Arbitration Law of ROC Article 14

Except as otherwise provide in this Law with respect request for recusal, parties may not raise objections to the arbitrators selected by the arbitration institution or court under this chapter.
中文原文 仲裁法第14條
對於仲裁機構或法院依本章選定之仲裁人,除依本法請求迴避者外,當事人不得聲明不服。

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