Dave,
You would need to contact Police Scotland for that one. I am sure there will be someone who will be driving illegaly up here, in the same way as it stands now the 80mg law in England catches a number the following morning.
Personally, I agree with the new law, having witnessed a drink driving related accident. I do however feel, lets leave the Broads as they are, there will always be the ejit who goes OTT, its the nature of the beast as they say.
I brought the new law to the attention of all for that specific reason if you are crossing the border today. Best to be forewarned than left to find out when its too late IMHO.
Iain.