Administrative Appeal Act Article 35

An administrative appeal representative might have undertook all administrative appeal conducts as authorized in a administrative appeal case. However, a special authorization is required to withdraw an administrative appeal case.
中文原文 訴願法第35條
訴願代理人就其受委任之事件,得為一切訴願行為。
但撤回訴願,非受特別委任不得為之。

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