Labor Inspection Act Article 13

Labor inspector shall not pre-notify any business entity the schedule of an inspection except the following:1.A review or an inspection as prescribed in Article 26.2.An inspection of hazardous machinery or equipment.3.An investigation of occupational accident.4.Other inspections approved by the labor inspection agency or competent authority.
中文原文 勞動檢查法第13條
勞動檢查員執行職務,除左列事項外,不得事先通知事業單位:
一、第二十六條規定之審查或檢查。
二、危險性機械或設備檢查。
三、職業災害檢查。
四、其他經勞動檢查機構或主管機關核准者。

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