The Regulation for Medical exam of the Seafarer and Medical Institutions Article 6
In the case that the medical certificate of a seafarer expires during the course of a voyage or will expire in the near future, as well as in urgent cases, the Maritime Administration may permit the seafarer to work on board until the next port of call, at which the seafarer can get a check-up and obtain a medical certificate from a qualified medical practitioner, provided that said permission period does not surpass three months.
中文原文 船員體格健康檢查及醫療機構指定辦法第6條
船員持有之體格檢查證明書在航行中到期或最近過期且遇有緊急情況，航政機關得允許該船員工作至其可從合格醫師處取得體格檢查證明書之下一停靠港，其期間不得超過三個月。