Enforcement Rules of the Commodity Inspection Act Article 22

Inspector performing official duties outside the office shall wear identity badges and shall, in the case of harbor/airport inspection personnel, wear uniforms.
中文原文 商品檢驗法施行細則第22條
檢驗人員執行外勤任務時,應配帶識別證。
港埠檢驗人員並應穿著制服。

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