um in vic engenieers certificates are only technically valid for 30days from date of issue, allowing you to get a roadworthy and then get the details changed with vic roads. as long as its on the cert, then you sort of covered but you can still get defected and sent for a roadworthy or even epa emmissions testing. so its not a 100% cover but it does mean that for what you did it was signed off as legit and makes it hard for vic roads not to allow it if its reinspected.

thats what was explained to me.