Regulations concerning Courtesy Clearance Operation in Taoyuan International Airport Article 10-1

For those who apply for ambassadorial courtesy, their entourage are also allowed to use the Official VIP lounge for departure or arrival. Luggage and passports of the entourage are allowed to be checked by examiners specially dispatched for this purpose.
中文原文 國際機場禮遇作業辦法第10-1條
申請國賓禮遇者,國賓隨行人員得一併申請隨同自國賓接待室入、出國,所攜之行李驗放及護照之查檢准予派員代予查驗。

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