Victoria has some of the tightest speeding tolerances in Australia, with 3 km/h if the speed is under 100 km/h, or 3% if over 100 km/h. This is despite the fact that the Australian Design Rules only stipulate that a car’s speedometer must be accurate within a 10% tolerance.
Yes, that’s right. My state has the world’s most inflexible and impossible to obey anti-speeding laws.
From Wikipedia.