From the NZ equivalent
"Speeding
Speeding fines increase progressively from $30 for speeds less
than 10km/h over the limit, to $630 for speeds up to 50km/h
over the limit. In addition to a fine, you will also incur demerit
points. See the Demerit points section for more information.
If your speed is more than 40km/h above the speed limit you
can get a 28-day licence suspension, and at more than 50km/h
over the limit you can also be charged with careless, dangerous
or reckless driving"
Which means you go to court. Still Robert exceed the limit by 118 kph and the fine was the same as if he was doing 150.
"Demerit points remain active on your licence record for a period
of two years from the date of the offence. However, if the court
disqualifies you for a period of six months or more, any active
demerit points recorded on your licence record at the time will
be cancelled and will no longer contribute to your active demerit
point total."