Administrative Procedure Act Article 97

In any of the following circumstances, no statement of reasons is required for an administrative disposition rendered in writing:1. Where no restraint is imposed upon the right or interest of any person;2. Where the reasons supporting the administrative disposition is known or knowable to the person subject to the disposition or the person affected thereby without the necessity for the authority rendering the disposition to make further explanations;3. Where the administrative disposition is one of the same kind rendered en masse or by means of automatic machine, for which no statement of reasons is needed in light of the situation involved;4. Where the disposition is a general disposition which has been announced by a public notice or has been published in a government gazette or newspaper;5. Where the disposition is one that relates to examination, qualifying and appraisal procedure in respect of specialized knowledge, skills or qualification; and 6. Where it is prescribed by law that no statement of reasons is necessary.
中文原文 行政程序法第97條
書面之行政處分有下列各款情形之一者,得不記明理由︰一、未限制人民之權益者。
二、處分相對人或利害關係人無待處分機關之說明已知悉或可知悉作成處分之理由者。
三、大量作成之同種類行政處分或以自動機器作成之行政處分依其狀況無須說明理由者。
四、一般處分經公告或刊登政府公報或新聞紙者。
五、有關專門知識、技能或資格所為之考試、檢定或鑑定等程序。
六、依法律規定無須記明理由者。

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