Obviously different countries have different rules (goes for states in Aus too obviously

) but I guess bureaucrats tend to think to varying degrees the same the world over.
I was always told be careful how much and what info you divulged because different sentences and too much info will lead down different rule paths. For example (here in Qld) if you tell them a bike has been imported it will be straight to get an engineers certificate and all the hoo hah.
On the other hand they don't have any records before the mid '70's (or might be later) so if you had a bike which had apparently been registered (somewhere in Aus) for a period prior to that it would usually just involve your friendly roadworthy man giving you a certificate, a couple of forms and bingo!! (Mmmmm)
When I registered the AE there was no record of any such thing as an American Eagle model of motorcycle on Qld transport data base for obvious reasons. Told them what it was, can't quite remember how I said I acquired it or its history (!), 2 of them spending 10 minutes deciding which rule flow chart they could follow a couple of keystrokes and there is now a 1969 Laverda 750 American Eagle model on the database (didn't even have to see the bike!).................................. (Easiest to describe it as Laverda with AE model designation, they like that type of thing)