Hi Ali,
So sorry to hear that you've hit a blip. I'm not in the know about electrical registration etc. but I'll throw up these few links to see if they are of any use to you.
ERWB .
This is an old thread from this forum which explains a little and reveals that
Johnty off here is an electrician. He’s been around recently so perhaps he can talk you through it. I don't know how often he looks in on us, but we can but hope it'll be soon or perhaps you could send him a PM asking if he'd mind looking at your post. Looks like KC's hubby is also an electrician so perhaps they've got more information together by now, too, as they were looking into the situation in August last year.
I’ve heard that this guy can be very helpful with queries about this sort of thing.
Paul.McGrail@med.govt.nz
I'll keep looking to see if I can find anything more. Hope you get sorted soon so you don't have to worry any more.