Regulations Governing Share Repurchase by Exchange-Listed and OTC-Listed Companies Article 6

A company repurchasing its own shares shall enter the information specified in Articles 2 and 3, and in the preceding article into the Market Observation Post System (MOPS).For matters required to be reported or publicly announced under these Regulations, the reporting and public announcement is complete once the company has transmitted the information to the MOPS.
中文原文 上市上櫃公司買回本公司股份辦法第6條
公司買回股份,應將第二條、第三條及前條規定之訊息內容,輸入公開資訊觀測站資訊系統。
本辦法規定應申報或公告之事項,公司傳輸至公開資訊觀測站後,即屬完成申報及公告。

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