Is a Sandman still a Samdman?????

[Vombil]

Both WB and TwoTees have pretty much got it right. Except:

1986 is recent when we are talking cars (or interest) built from the late 60's!
And when a chassis (with chassis number) is changed you no longer have the same car in terms of identity. The car becomes what the chassis number was, so if it was a HZ van and a HQ van's chassis is used then it is registered and viewed (by RTA, Police etc) as a HQ van. I know this is an oversimplification but it is basically how it works.

this is not the case in WA. The vehicle retains the ID on the tags.