Trademark Act Article 50

Provisions govern in oppositionWith respect to the grounds for an opposition to a registered trademark, the provisions in effect at the time of the said trademark publication of registration shall govern, unless otherwise prescribed in Paragraph 1 and Paragraph 3 of Article 106.
中文原文 商標法第50條
異議商標之註冊有無違法事由,除第一百零六條第一項及第三項規定外,依其註冊公告時之規定。

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