Regulations concerning Courtesy Clearance Operation in Taoyuan International Airport Article 9

TAC has the right to stop the application or interrupt the execution of business courtesy clearance if its receiver is under investigation or if it is improper to allow its continuation.
中文原文 國際機場禮遇作業辦法第9條
商務禮遇對象如有因案待查或不宜繼續執行禮遇之情形,機場公司得不同意禮遇之申請或停止禮遇之執行。

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