Administrative Appeal Act Article 25

The elected or assigned representative(s) might be replaced or varied in numbers.The replacement or variation of representative(s) stipulated in last Paragraph shall not be effected unless the agency with jurisdiction of administrative appeal was informed via written notice.
中文原文 訴願法第25條
代表人經選定或指定後,仍得更換或增減之。
前項代表人之更換或增減,非以書面通知受理訴願機關,不生效力。

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