Current situation is that the Armegeddon' scenraio legislation has had it's first reading in EU Parliament . It has been referred back to committee to see if further clarification is possible ie granting any leeway to individual members states to define their own take on Historic.
As it stands the general definition is ( paraphrasing as they haven't rewritten into a totally legible form) but " 30 years old , rarely used and standard ". It is highly UNlikely to be retrospective, no legislation ever has been in the past.
However once passed in EU Parliament it will pass into UK law 6 weeks after the results are published We have no idea how it is to be applied but best guess would be the prevention of modified cars being allowed Historic reg from that date on BUT there is no other class for them to enter ?! IE If already on the system fine but if needing a Historic identity to gain a registration they would not be allowed . The current Historic wording would also disallow rebodying ( totally different to 8 points system) unless the mods were 'Contemporanious' .
Likewise best guess on date of second vote would be sometime around March next year.
Link to last info we have
http://www.the-ace.org.uk/chat_with_ace/viewtopic.php?f=7&t=3934