Enforcement Rules of Food Administration Act Article 10

The competent authority shall, while consigning contracted public stock keeper to handle the collecting, store, milling and distributing public stock, execute the consignment contract , and the contracted public stock keeper shall provide collateral.
中文原文 糧食管理法施行細則第10條
主管機關依本法第八條第一項規定委由公糧業者辦理公糧經收、保管、加工及撥付事項時,應簽訂契約,公糧業者並應提供擔保。

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