Section 13(3) in The Merchant Shipping (Crew Accommodation) Rules, 1960
(3)Every space appropriated for use as sanitary accommodation shall be served by one or more scuppers which do not serve any space other than sanitary accommodation. The scuppers shall be at least 5.10 centimetres in diameter and shall be situated wherever water is likely to collect on the floor of the space. Provided that no scupper shall be required in washing accommodation appropriated for the sole use of one person.
