Regulations Governing Investment in Securities by Overseas Compatriots and Foreign Nationals Article 20

An offshore overseas compatriots or foreign national consigning trading of domestic securities to a domestic securities firm shall provide a record of the consignment. The appointed custodian institution shall confirm the trade and handle settlement procedures.
中文原文 華僑及外國人投資證券管理辦法第20條
境外華僑及外國人委託國內證券商買賣國內證券,應提供委託紀錄,並由指定之保管機構確認交易及辦理交割手續。

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