Enforcement Rules of the Trademark Act Article 8

The specified period during which an action should be done pursuant to the Act or these Rules other than Article 34 may be extended if such extension is requested by the party concerned and the request is submitted to the Registrar Office, with the statement of the reason and the period of extension, before the original period expired.
中文原文 商標法施行細則第8條
依本法及本細則指定應作為之期間,除第三十四條規定外,得於指定期間屆滿前,敘明理由及延長之期間,申請商標專責機關延長之。

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