Regulations Governing the Clearinghouse’s Plan of Security Measures for Personal Information files Article 18

The clearinghouse shall check regularly whether the specific purpose for retaining certain personal information no longer exists or overdues. When the specific purpose disappears or the duration of retention has expired, the clearinghouse shall follow the provisions under Paragraph 3, Article 11 of the Act.
中文原文 票據交換所個人資料檔案安全維護計畫標準辦法第18條
票據交換所應定期確認其所保有個人資料之特定目的是否消失,或期限是否屆滿,若特定目的消失或期限屆滿時,應遵守本法第十一條第三項規定。

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