Enforcement Rules of the Trademark Act Article 33

Where the consent to the application for trademark registration had been given pursuant to the provisos of Subparagraphs 10 to 15 of Paragraph 1 of Article 30 of the Act, if afterward the person who consented to such earlier filed trademark files an application for registration of a trademark which shall not be registered as prescribed in Subparagraph 10 of Paragraph 1 of Article 30 of the Act in relation to such earlier filed trademark, the later filed trademark shall not be registered unless the proprietor of such earlier filed trademark consents to the application for registration of such later filed trademark.
中文原文 商標法施行細則第33條
同意他人依本法第三十條第一項第十款至第十五款各款但書規定註冊者,嗣後本人申請註冊之商標有本法第三十條第一項第十款規定之情形時,仍應依該款但書規定取得該他人之同意後,始得註冊。

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