Regulations on Users of Telecommunications Businesses Inquiring Communication and Account Records Article 8

Telecommunication personnel shall keep the procedure and data of the inquiry confidential and shall not disclose such information.
中文原文 電信事業用戶查詢通信紀錄及帳務紀錄作業辦法第8條
電信事業人員,對於查詢作業之過程及資料內容等,應予保密,不得洩漏。

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