Administrative Litigation Act Article 85

After the presiding judge designates the date for a court session, the administrative court clerk shall issue and serve a summons upon the persons who have interests in the litigation. Notwithstanding, in cases where the presiding judge has informed such persons of the date in person and ordered them to appear accordingly, or where the persons who have interests in the litigation have notified the court in pleadings that they will appear accordingly, such act shall have the same effect as a service of summons.
中文原文 行政訴訟法第85條
審判長定期日後,行政法院書記官應作通知書,送達於訴訟關係人。
但經審判長面告以所定之期日命其到場,或訴訟關係人曾以書狀陳明屆期到場者,與送達有同一之效力。

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