but inevitable that a substantial proportion of vehicles operating in the course of inter-State trade and commerce will be subjected to undue and intolerable restraints and delays. Such a result is, in my opinion, the effect of the relevant provisions of the legislation in its present form " 1. In the two cases cited reasons were given HOTCHKISS. for the conclusion that the entry of vehicles engaged in inter-State
trade might not consistently with S. 92 be impeded by requirements of State law which, if obeyed, made inter-State transport in any efficient form impracticable and left the person proceeding by a motor vehicle from another State into New South Wales without any legal right to do SO.
The result is that the law of New South Wales, by S. 5B (1) and
(1) (c) (v) of the Act, creates prohibitions which, according to their terms, would apply to motor vehicles in the course of inter-State trade commerce or intercourse and the prima facie operation of those prohibitions is not qualified or modified by regulations rendering the law consistent with the freedom of inter-State trade commerce and intercourse. To that extent, therefore, the prohibi- tion must be inoperative. It is nothing to the point to say that the actual administration of the law may be open to no such objection. Indeed to say that is perhaps only another way of saying that the impossibility is recognised in administrative practice of reconciling the provisions of the Act and regulations with S. 92.
The defendant company is entitled to rely on the invalidity pro tanto of the law under which it is prosecuted, even if by a law properly framed the case might have been covered.
Accordingly the order nisi should be made absolute and the con- viction quashed.
McTIERNAN J. I agree that the conviction is wrong in law. The conviction was for an offence under the Motor Traffic Act 1909-1955 (N.S.W.) consisting in a contravention of S. 6 (1) (c) (v).
I do not repeat the facts of the case.
The compulsory registration under statute of motor vehicles used on roads in the course of inter-State commerce is not necessarily incompatible with S. 92 of the Constitution. Such registration may be truly regulatory of the commerce of the operator of a motor vehicle engaged in such commerce. But the difficulty of recon- ciling S. 5B (1), and S. 6 (1) (c) (v) with S. 92 arises rather from the procedure prescribed by the regulations for registering a motor vehicle than the substantive system of registration embodied in the
1(1955) 93 C.L.R., at pp. 289, 290.