Does non-recognition of out-of-State roadworthy certificates breach the freedom of inter-State trade and full faith and credit provisions of the Constitution?

One of the burdens of federalism derives from the fact that several Australian jurisdictions refuse to accept, in satisfaction of their statutory requirements that vehicle owners obtain a roadworthy certificate in respect of a vehicle they wish to register, roadworthy certificates issued by other jurisdictions. The author argues that this imposes a discriminatory burden of a protectionist kind on purchasers of vehicles and is therefore a breach of s 92 of the Constitution. The author also proposes a new interpretation of the full faith and credit requirement contained in s 118 of the Constitution which would govern cases where one jurisdiction issues a certification as to status relating to a person or thing as a result of the application of a common standard which has been adopted by different jurisdictions. The author argues that under such an interpretation, non-recognition of a roadworthy certificate which was issued by another jurisdiction in accordance with the Australian Design Rules, issued by the Commonwealth under the Motor v Vehicle Standards Act 1989, which all jurisdictions have adopted, should be found to be a breach of s 118. A finding that non-recognition is unconstitutional under either or both of s 92 and s 118 would relieve vehicle owners who already have a certificate issued in one jurisdiction of the burden of having a vehicle re-tested when they seek to register it in another.