Comment Re: 7 slots. a-z + 1-9 (no 0 because O vs 0) (Score 1) 186
Hmm, well I used the figure for car sales, but I guess commercial vehicles and motorbikes need to be added on. Then there's cars being re-registered from other states. Do cars get a new number if they're de-registered and re-registered later? And I guess some combinations are probably banned as they spell something offensive. Some numbers seem to have been skipped, and you need a bit of headroom to give you time to bring in a new system. So 45 years is about right.