Trademark Act Article 51

Avoidance of examiner in oppositionAn application for opposition to a trademark shall be examined by an examiner, who did not participate in the examination of the application for registration of the opposed trademark.
中文原文 商標法第51條
商標異議案件,應由未曾審查原案之審查人員審查之。

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