Securities and Exchange Act Article 51

A director, supervisor, or managerial officer of a securities firm shall not serve concurrently in any position at another securities firm. However, if because of an investment relationship, and with the approval of the Competent Authority, a director, supervisor, or managerial officer may serve concurrently as a director or supervisor of the invested securities firm.
中文原文 證券交易法第51條
證券商之董事、監察人及經理人,不得兼任其他證券商之任何職務。
但因投資關係,並經主管機關核准者,得兼任被投資證券商之董事或監察人。

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