If the Minister considers that, by reason of the risk of serious bodily injury to persons employed, it is expedient that notice should be given under section eighty of this Act in every case of any special class of explosion, fire, collapse of buildings, accidents to machinery or plant or other occurrences in a factory, he may by regulations extend the provisions of that section to any such class of occurrences, whether death or disablement is caused or not.

The Minister may by any such regulations allow the required notice of any occurrence to which the regulations relate, instead of being sent forthwith, to be sent within the time limited by the regulations.