Enforcement Rules of the Labor Inspection Act Article 19

Prior to entering a business entity for inspection in accordance with Article 22 of the Act, labor inspector shall inform the employer and labor union of the purpose of the inspection and request that an assigned personnel accompany the inspection.
中文原文 勞動檢查法施行細則第19條
勞動檢查員依本法第二十二條規定進入事業單位進行檢查前,應將檢查目的告知雇主及工會,並請其派員陪同。

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