The Banking Act of The Republic of China Article 116

The term "foreign bank" as used in this Act shall refer to a bank which is organized and registered in accordance with the laws of a foreign country and whose branch office is registered and operated within the territory of the Republic of China in accordance with the Company Act and this Act.
中文原文 銀行法第116條
本法稱外國銀行,謂依照外國法律組織登記之銀行,在中華民國境內依公司法及本法登記營業之分行。

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