Administrative Procedure Act Article 136

Where an administrative authority is unable to determine the facts or the legal relations as the basis for an administrative disposition notwithstanding an inquisition process having been conducted ex officio, it may enter into a compromise or an administrative contract with a citizen in lieu of administrative disposition in order to settle the dispute and to effectively achieve the purpose of administration.
中文原文 行政程序法第136條
行政機關對於行政處分所依據之事實或法律關係,經依職權調查仍不能確定者,為有效達成行政目的,並解決爭執,得與人民和解,締結行政契約,以代替行政處分。

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