(1) In this Part:
"harmful substance" means a substance which either:
(a) is identified as a marine pollutant in the International Maritime Dangerous Goods (IMDG) Code; or
(b) meets the criteria in the Appendix of Annex III of the Convention.
"packaged form" means a form of containment specified for harmful substances in the International Maritime Dangerous Goods (IMDG) Code.
(2) Except in so far as the contrary intention appears, an expression that is used in this Part and in Annex III to the Convention (whether or not a particular meaning is assigned to it by that Annex) has, in this Part the same meaning as in that Annex.