Regulations of Aircraft Registration Article 5

If an aircraft conforms with the terms of Article 10 or Article 11 of the Act, the aircraft owner or operator (hereinafter referred to as the owner or operator) may apply to CAA for aircraft nationality registration of the Republic of China (hereinafter referred to as nationality registration).
中文原文 航空器登記規則第5條
航空器合於本法第十條或第十一條之規定者,航空器所有人或使用人(以下簡稱所有人或使用人)得向民航局申請中華民國航空器國籍登記(以下簡稱國籍登記)。

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