Regulations Governing Licences and Ratings for Airmen Article 9

When airman certificate is lost or the holder's original information has changed, the holder or his employed organization shall request CAA for replacement and amendment.
中文原文 航空人員檢定給證管理規則第9條
航空人員檢定證遺失或原申請資料變更時,其補發或換發由該航空人員或其所屬機構向民航局申請。

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