Regulations for Passenger Ship Administration Article 101

An international passenger ship whose voyage spans midnight shall provide at least one public bath room, for men and women separately. Partition boards shall be set up for bathing facilities of the public bath room. The number of bathing facilities shall be calculated based on the passenger quota, and at least one for every 100 passengers. When the number of passengers is less than 100, it shall be deemed as 100. If there are bathing facilities in passenger cabins, the passenger quota could be excluded from the calculation of the number of bathing facilities.
中文原文 客船管理規則第101條
航程時段跨越午夜十二時之國際客船,應為乘客分別設置男女專用公共浴室至少各一間。
公共浴室之沐浴設備應有隔間,沐浴設備數量按乘客定額每滿一百人至少一個,未達一百人者,以一百人計。
前項乘客定額計算,得扣除已設置沐浴設備之房艙乘客定額人數。

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