Firstly, I wouldn't believe everything I read on the internet. If I did, my life would be full of fears and hope at the same time, 99% of which are blatantly made up by some blogger.
Secondly, the speed limit outside schools is 40km/hr with zero tolerance. But this is in effect only during school (drop off?) hours. Going past school buses that have stopped however, this would be 20.
You are correct on both points :o) However, what I really wanted to know was: outside the school hours, what tolerance applies to the 50km limit? Normal road tolerance or the lower 4km tolerance? I was just trying to work out if I was likely to get a ticket. I'll update the thread if I do, and then we'll all know for sure!