19. Where in any harbour or harbour area explosives have deteriorated or have undergone any change which might significantly increase the risks attendant upon their carriage and handling within the harbour or harbour area, the person having custody of those explosives shall—
(a)notify the Secretary of State and the harbour master and, where the explosives are at a berth, the berth operator of the deterioration or change;
(b)agree with the harbour master any additional precautions to be taken before moving or handling them; and
(c)take those precautions.