(1) In these regulations:
"hazard division", of an explosive, means—
(a) the hazard division of the explosive under this regulation; or
(b) if the explosive is stored or carried with an explosive of a different hazard division under this regulation—the collective hazard division worked out under regulation 16.
(2) Explosives may be classified into hazard divisions as follows:
(a) hazard division 1.1—explosives that have a mass explosion hazard;
(b) hazard division 1.2—explosives that have a projection hazard, but not a mass explosion hazard;
(c) hazard division 1.3—explosives that have a fire hazard and either a minor blast hazard or a minor projection hazard or both, but not a mass explosion hazard;
(d) hazard division 1.4—explosives that present only a small hazard if ignited or initiated, with the effects largely confined to the package, and no expected projection of fragments of appreciable size or range;
(e) hazard division 1.5—very insensitive explosive substances that have a mass explosion hazard;
(f) hazard division 1.6—very insensitive explosive articles that do not have a mass explosion hazard.