A statement of the class, division and compatibility group to which an explosive has been assigned in accordance with the Australian Code for the Transport of Explosives by Road and Rail (known as the AE Code).

The main hazard classifications for explosives are:

1.1 Mass explosion hazard. If any part of the inventory detonates the bulk of the inventory will sympathetically detonate.

1.4 No risk of a mass explosion. Should part of the inventory detonate there is no risk of the remainder sympathetically detonating.