Public Health Specialists Act Article 15

Public health specialists shall prepare records and reports for their practice of business activities; further with the affixation of signatures or seals and specifying the dates of execution thereon. In the case of entrust by any client, the names, residences and mandates of the clients shall be recorded.The records and reports prescribed in the previous paragraph shall be kept for at least 3 years by the practicing institution or site.
中文原文 公共衛生師法第15條
公共衛生師執行業務,應製作紀錄及報告,並簽名或蓋章及加註執行年月日;受委託辦理者,並應記載委託人姓名或名稱、住所及委託事項。
前項紀錄及報告,應由執業之機構或場所至少保存三年。

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