Regulations for the Delegation of Certification of Aviation Products, Appliances and Parts Article 12

Delegated Organizations and Designated Representatives shall properly maintain filing of certification documents for such number of years as CAA may require and submit to CAA annually.
中文原文 航空產品與其各項裝備及零組件檢定委託辦法第12條
檢定機構及檢定代表執行檢定業務之相關文件,應依民航局規定之期限妥善保存,並應每年將執行檢定業務之相關文件報請民航局備查。

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