Administrative Litigation Act Article 82

Service by constructive notice shall take effect twenty days from the date of posting the notice or summons on the administrative court's announcement site or the court's website, and in case of publication in an official gazette or newspaper, from the last day of such publication; where service is effectuated in accordance with Subparagraph 3 of the preceding Article, such service shall take effect sixty days thereafter. Nevertheless, service effectuated by constructive notice upon the same party shall take effect the day after the date on which the notice is posted on the court's announcement site.
中文原文 行政訴訟法第82條
公示送達,自將公告或通知書黏貼公告處之日起,公告於行政法院網站者,自公告之日起,其登載公報或新聞紙者,自最後登載之日起,經二十日發生效力;於依前條第三款為公示送達者,經六十日發生效力。
但對同一當事人仍為公示送達者,自黏貼公告處之翌日起發生效力。

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