Attorney Regulation Act Article 122

When practicing law, a foreign legal affairs attorney shall explicitly state that he/she is a foreign legal affairs attorney and provide the name of his/her home jurisdiction.A foreign legal affairs attorney, unless being employed, shall establish his/her law firm to practice law.
中文原文 律師法第122條
外國法事務律師執行職務時,應表明其為外國法事務律師並告知其原資格國之國名。
外國法事務律師執行職務,除受僱用外,應設事務所。

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