Regulations for Passenger Ship Administration Article 63

Passenger cabins shall have sufficient windows for catching light and ventilation. However the number of windows may be reduced if the shipping administration authority or ship register institute deems that the lighting and ventilation facilities are adequate.
中文原文 客船管理規則第63條
乘客艙室為採光通風應設有足夠數量之窗戶。
但經航政機關或驗船機構認可,已置備足夠之照明與通風設備者,得酌准寬減。

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