on 23rd December 1954 entitled Variation of Road Traffic Regu-
lations 1951 the exemption from requirement of registration in the State of South Australia in the case of vehicles registered in any TOURIST
other State of the Commonwealth has since 31st January 1955 been COACHES PTY. LTD.
attempted to be removed in the case, inter alia, of all vehicles of the plaintiff which exceed two and one-half tons in unladen weight.
THE STATE
OF SOUTH
All of the vehicles referred to in par. 6 hereof exceed two and one- AUSTRALIA.
half tons in unladen weight and in consequence the registration fees made payable under the Act and the said regulations would if validly imposed be additional to the fees payable and paid by the plaintiff for the registration of the same vehicles in accordance with the laws of the States of New South Wales or Victoria as referred to in par. 11 hereof. 13. All of the passenger vehicles driven on the roads in South Australia which exceed two and one-half tons in unladen weight are used for the carriage in that State of passengers in the course of trade and commerce. 14. This cause is one within the original jurisdiction of this Honourable Court in that it involves the interpretation of the Constitution. And the plaintiff claims 1. A declaration that the Road Traffic Act 1934-1954 (S.A.) is beyond the powers of the Parliament of the State of South Australia and invalid. 2. A declaration that SS. 7, 8, 8b, 8c and 9 of the said Road Traffic Act are beyond the powers of the Parliament of the State of South Australia and invalid. 3. Alternatively with 1 and 2, a declaration that the said Road Traffic Act or SS. 7, 8, 8b, 8c and 9 thereof have no application to vehicles which are driven on the roads in South Australia exclusively on inter-State journeys for the carriage of passengers for reward. 4. Alternatively with 1, 2 and 3, a declaration that the said Road Traffic Act or SS. 7, 8, 8b, 8c and 9 thereof have no application to vehicles which are driven on the roads in South Australia exclusively on inter- State journeys for the carriage of passengers for reward and which are registered in accordance with the laws of a State other than South Australia and in respect of which registration fees have been paid in such other State. 5. An injunction restraining the defendants, their servants, agents, successors in title and deputies from enforcing against the plaintiff the provisions of the said Road Traffic Act or SS. 7, 8, 8b, 8c and 9 thereof in respect of any of the vehicles referred to in par. 6 hereof or in respect of any other vehicles operated by it in South Australia exclusively on inter-State journeys for the carriage of passengers for reward.
The defendants demurred to the whole of the statement of claim on the ground that it did not disclose any ground for the relief claimed or any part thereof and, in addition, pleaded to it as