National Treasury Act Article 4

Unless this Act and other laws provide otherwise, the handling of the disbursement, safekeeping and transferring of cash, bills and securities, and the safekeeping of deed documents of properties of each agency of the central government shall be performed by the commissioned bank or agent institution of the National Treasury (hereinafter referred to as the National Treasury agent institution).
中文原文 國庫法第4條
中央政府各機關關於現金、票據、證券之出納、保管、移轉及財產之契據等之保管事務,除本法及其他法律另有規定外,均應由國庫代理機關辦理之。

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