Administrative Procedure Act Article 61

During the hearing, the party is entitled to present his opinions and produce evidence and, if the hearing officer permits, may also put questions to officers designated by authorities, witnesses, expert witnesses, and other parties or agents thereof.
中文原文 行政程序法第61條
當事人於聽證時,得陳述意見、提出證據,經主持人同意後並得對機關指定之人員、證人、鑑定人、其他當事人或其代理人發問。

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