means any Commonwealth land declared by the regulations to be an explosives area and, where any such land consists of a part of the bed of the sea, or of a bay, estuary or river, includes the waters above the land.

means land the property of the Commonwealth and includes any other land:

means:

includes loading, unloading, discharging, stacking, stowing, storing, transporting and any operation incidental to, or arising out of, any of those operations.

means a ship, boat or other vessel used for any purpose on the sea or in navigation.