The idea
It should no longer be required to present a vehicle logbook and a proof of address when seeking to purchase a new or replacement numberplate. Should a law-breaker require a numberplate, he will steal mine (that's why I wanted a new one in the first place). Exasperated with petty bureaucracy, I will purchase future numberplates over the internet, without any documents, as will the law-breaker who can't be bothered to steal mine. The local motor spares emporium will thus be deprived of my business (and the law-breaker's).
Why is it important?
The existing requirement is pointless – it does nothing to enhance public safety, deprives local businesses of trade and requires shopkeepers to keep useless records.