Nowhere in the statutes is ‘year of registration’ mentioned, or manufacture- it’s just says 30 years of age. However, classification for vintage reg plates specifies manufacture date - so it’s obviously the intent with the tax eligibility too.

I’ve never had hassle switching over on anniversary of manufacture date - some clarification would be handy though, at the very least to stop some of the jobs worth’s trying to apply the anniversary of reg date rule which they’ve just picked out from their hole.