In this part—
"culpable person" , for a discharge of treated sewage or untreated sewage from
a ship, means—
(a) the ship’s owner; or
(b) the ship’s master; or
(c) another member of the ship’s crew whose act caused or contributed to the discharge, unless the member was acting under the direct supervision of the master or of someone authorised by the master for the purpose.
(a) a container or receptacle that is designed or constructed to receive sewage and hold it inside the container or receptacle for disposal; orExample for paragraph (a)—a portable toilet or holding tank
(b) a treatment system that is fitted with, or connected to, a container or receptacle mentioned in paragraph (a) .