89 Forfeiture of ship jettisoning cargo, etc.U.K.
(1)If any part of the cargo of a ship is thrown overboard or is staved or destroyed to prevent seizure—
(a)while the ship is [in United Kingdom waters]; or
(b)where the ship, having been properly summoned to bring to by any vessel in the service of Her Majesty, fails so to do and chase is given, at any time during the chase,
the ship shall be liable to forfeiture.
(2)For the purposes of this section a ship shall be deemed to have been properly summoned to bring to—
(a)if the vessel making the summons did so by means of an international signal code or other recognised means and while flying her proper ensign; and
(b)in the case of a ship which is not a British ship, if at the time when the summons was made the ship was [in United Kingdom waters].