Administrative Appeal Act Article 62

While the agency with jurisdiction of administrative appeal concluded that the administrative appeal pleading is not make in proper form or is defective in other respects but is supplementable, the agency shall assign a period of 20 days and notify the administrative appellant to supplement the administrative appeal pleading within such period.
中文原文 訴願法第62條
受理訴願機關認為訴願書不合法定程式,而其情形可補正者,應通知訴願人於二十日內補正。

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