Regulations of Aircraft Registration Article 8
Nationality registration certificate shall be posted at a conspicuous place of the aircraft to facilitate inspection by CAA at all times.
中文原文 航空器登記規則第8條
國籍登記證書應懸掛於航空器上顯著之處，民航局得隨時檢查之。
English translation for reference only; the Chinese text prevails. Not legal advice.