substitute
(a) if the serious event involves the death of a worker or another person—
(i) as soon as possible, but not later than 2 hours after the event; and
(ii) in writing not later than 48 hours after the event;
(b) for a serious event mentioned in the Act, section 36 (b)—
(i) as soon as possible; and
(ii) in writing not later than 8 days after the event;
(c) if the serious event involves a serious injury to any person—
(i) as soon as possible; and
(ii) in writing not later than 48 hours after the event;
(d) for any other serious event—
(i) as soon as possible; and
(ii) in writing not later than 48 hours after the event.