>>1946883Laws like this are obsolete and very obviously made by motorists who do not follow the law.
Any vehicle, single track or not, occupies one lane, along the entire length of the vehicle.
To pass a vehicle, single track or not, must first switch lanes. Since, as mentioned above, the rightmost lane is occupied.
Also all vehicles must use the right side of the right lane.
Thus, this has always been effectively mandatory, as long as the vehicle being overtaken is single track, both vehicles follow the law and the road is wider than 1,5m + the width of the single track vehicle.
Much law mo effect. It is not like motorists cared about the law, environment or anyone that is not themselves.