Administrative Procedure Act Article 171

Where a petition presented by the people is deemed by the authority entertaining the petition to be well grounded, it shall take appropriate actions therefor; if the petition is deemed to be groundless, it shall give the petitioner a notification thereof and explain in essence its point of view.Where the authority entertaining a petition considers that the major points contained in the petition lack clarity and certainty or are open to doubts, it may notify the petitioner accordingly and demand a supplementary petition.
中文原文 行政程序法第171條
受理機關認為人民之陳情有理由者,應採取適當之措施;認為無理由者,應通知陳情人,並說明其意旨。
受理機關認為陳情之重要內容不明確或有疑義者,得通知陳情人補陳之。

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