Regulations Governing Management of the Health Examination of Employed Aliens Article 4

When applying for employment permits and employment extension permits for Type A Foreign Workers other than those specified in Article 5 herein, employers are not required to submit a qualified health examination certificate for those workers. However, for employed aliens who have entered the country for employment and have stayed for more than three months, the central competent health authority may announce the health examination certificate required to be submitted in consideration of the epidemic situation or the specific circumstance of the countries where they have resided.
中文原文 受聘僱外國人健康檢查管理辦法第4條
雇主申請第五條規定以外之第一類外國人之聘僱許可及展延聘僱許可,得免檢具該類人員之健康檢查合格證明。
但對於入國工作三個月以上者,中央衛生主管機關得依其曾居住國家疫情或其他特性,公告其應檢具之健康檢查證明。

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