If you, as a property owner, find explosive ordnance on your property, you must report this immediately, otherwise you will be liable to prosecution and expose yourself and other persons to a high degree of danger. Often explosive ordnance is not recognizable as such. Many are rusted beyond recognition or resemble commercial objects in appearance. The duty to report also applies to walkers who find ammunition.

Explosive ordnance includes all munitions intended for warfare, in particular bombs, mines, grenades, explosives and detonators.