Administrative Regulations for the Operators of Production Facilities of Radioactive Material Article 6

If the operator certificate is lost, damaged or there is a change of designated items during the validity period, the applicant shall fill in the replacement application form with related documentary proof attached, and submit the application through the facility operator to the competent authority for reissue. The validity period of the reissued certificate shall be the same as that of the original certificate.
中文原文 放射性物質生產設施運轉人員管理辦法第6條
運轉人員證書於有效期限內遺失、損毀或變更登載事項者,申請人應填具補發申請書,檢附相關證明文件,經由設施經營者向主管機關申請補發,其有效期限至原證書有效期限屆滿為止。

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