Enforcement Rules of the Electronic Signatures Act Article 17

For the industrial investigation conducted in accordance with Article 19 of the Act, the competent authority may request certification authorities to provide the following information in the designated formats:1. The population to which various certificates are issued.2. Valid quantity of various certificates.3. Other statistical data designated by the competent authority.
中文原文 電子簽章法施行細則第17條
主管機關為辦理本法第十九條之產業調查,得請憑證機構依指定格式提供下列資料:
一、各類憑證簽發對象之族群。
二、各類憑證有效數量。
三、其他主管機關指定之統計資料。

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