Could this be a sandman - Chassis swap

[TwoTees]

legally in all states of australia the chassis number is the identifier of the vehicle..no if buts or maybe.
a sandman body with its old tags attached regardless of identifying things like console brackets etc is still just a body on another chassis if these 2 items do not align for numbers and therefore desreases its collectibility and value..

Are you are saying the chassis forms the identity of the vehicle as a whole and if the chassis is different from the original the entire vehicles identity has changed? Changed to what?

Is this is a legal thing or just your opinion?