1 Jettisoning of harmful substances carried in
packaged form shall be prohibited, except where necessary for the
purpose of securing the safety of the ship or saving life at sea.
2 Subject to the provisions of the present Convention,
appropriate measures based on the physical, chemical and biological
properties of harmful substances shall be taken to regulate the washing
of leakages overboard, provided that compliance with such measures
would not impair the safety of the ship and persons on board.