Seafarer's Service Regulations Article 11

A seaman disembarking due to sick leave shall notify the director in writing and attain approval from the master or shall be relayed by dispatch personnel. Sick leave ashore because of an injury requires approval from the master, and the employer shall be notified.
中文原文 船員服務規則第11條
海員請假應以書面報告主管轉請船長批准或派員接替後,方得離船,因傷病必需離船留岸醫治,由船長核准後報告雇用人。

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