The Banking Act of The Republic of China Article 4

The business items of each bank shall be determined individually by the central competent authority in accordance with the bank’s classification and within the business scope specified in this Act, and shall be stated on the bank’s business license. However, business operations related to foreign exchange shall be approved by the Central Bank of the Republic of China.
中文原文 銀行法第4條
各銀行得經營之業務項目,由中央主管機關按其類別,就本法所定之範圍內分別核定,並於營業執照上載明之。
但其有關外匯業務之經營,須經中央銀行之許可。

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