In this regulation, the packing group for particular dangerous goods is—
(a) if a determination that the goods are of a particular packing group is in effect—the packing group stated in the determination; or
(b) otherwise—the packing group for the goods worked out using the ADG Code.
Notes—1 Dangerous goods are assigned to a packing group to indicate the degree of danger, and the level of containment required for, the goods. The packing groups, and the degree of danger they indicate, are—• packing group I (substances presenting high danger); and• packing group II (substances presenting medium danger); and• packing group III (substances presenting low danger).2 For the packing group for dangerous goods listed in the dangerous goods list, see column 5 of the list and any special provision of chapter 3 .3 of the ADG Code applied to the goods under column 6 of the list.