National Treasury Act Article 3

The National Treasury is to commission the Central Bank to act as an agent to take charge of disbursing, safekeeping and transferring activities of cash, bills, and securities, and the safekeeping of deed documents of properties, unless the law provides otherwise.In places where the Central Bank has no branch offices, after obtaining the agreement from the MOF, the Central Bank could commission other banks, cooperative bank or postal offices to be the agent in handling the government treasury tasks.
中文原文 國庫法第3條
國庫關於現金、票據、證券之出納、保管、移轉及財產之契據等之保管事務,除法律另有規定外,以中央銀行為代理機關。
中央銀行在未設分支機構之地點,經洽財政部同意後,轉委其他銀行、合作金庫或郵政機關代辦。

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