Regulations Governing Public Tender Offers for Securities of Public Companies Article 18

The length of public tender offer period shall not be less than 20 days nor more than 50 days.If what is provided under Paragraph 2 of Article 7 occurs or for another legitimate reason, the original Offeror may report to the FSC and make a public announcement of an extension of the public tender offer period. However, the extension period shall not exceed 50 days, and shall be limited to one time only.
中文原文 公開收購公開發行公司有價證券管理辦法第18條
公開收購之期間不得少於二十日,多於五十日。
有第七條第二項之情事或有其他正當理由者,原公開收購人得向本會申報並公告延長收購期間。
但延長期間合計不得超過五十日,且以一次為限。

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