Race cars were registered E Class A ,which was a farm registration for vehicles ,it was to cover machinery which had to go between farms on public roads. The Mini Max i raced and hillclimbed had such a plate,so this means the race cars were covered when they raced at Renwick,Waimate etc.A form of this registration still exists as far as i know and came across it a few years back when lookinging at a BMW 2002 forsale in Tauranga and this guy had his car registered like that and used it on the road all the time.............not a good idea ,because if he had had an accident he would not have been covered !