Civil Aviation Act Article 20
Unless duly registered, transfer of ownership, creation of mortgage, or lease of an aircraft, shall not be a defense against a third party.
中文原文 民用航空法第20條
航空器所有權移轉、抵押權設定及其租賃，非經登記不得對抗第三人。
English translation for reference only; the Chinese text prevails. Not legal advice.