A driver overtaking a vehicle –

(a) must pass the vehicle at a sufficient distance to avoid a collision with the vehicle or obstructing the path of the vehicle; and

(b) must not return to the marked lane or line of traffic where the vehicle is travelling until the driver is a sufficient distance past the vehicle to avoid a collision with the vehicle or obstructing the path of the vehicle.

Penalty:  Fine not exceeding 10 penalty units.

Note Marked lane and overtake are defined in the dictionary.