The Central Bank of the Republic of China (Taiwan) Act Article 21

The discount rate and the rates on other accommodations shall be determined by the Bank in the light of prevailing financial and economic conditions, and made public. However, a branch office of the Bank may establish its own discount rate and the rates on other accommodations according to special local financial conditions, with prior approval by the Head Office, and make them public.
中文原文 中央銀行法第21條
本行之重貼現率及其他融通利率,由本行就金融及經濟狀況決定公告之。
但各地區分行得因所在地特殊金融狀況,酌定其重貼現率及其他融通利率,報經總行核定公告之。

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