Constitution that, on the imposition of uniform duties of customs, the power of the Parliament of the Commonwealth to impose duties of customs and of excise shall become exclusive and also, by Isaacs, Higgins, Powers, Rich and Starke JJ. (Gavan Duffy J. dissenting), on the ground that it violates the provision in sec. 92 of the Constitution that, on the imposition of uniform duties of customs, trade, commerce, and intercourse among the States shall be absolutely free.
CASES referred by Knox C.J.
An action was brought in the High Court by the Commonwealth and the Attorney-General for the Commonwealth against the State of South Australia and the Commissioner of Taxes of South Australia in which the plaintiffs, by their statement of claim indorsed on the writ alleged, in substance, as follows :-
1. The Parliament of the Commonwealth has enacted various Acts providing for bounties to be paid out of the Consolidated Revenue Fund of the Commonwealth in respect of the production of shale oil and power alcohol in Australia and also for the imposition and payment of duties of customs and duties of excise on (inter alia) spirits, petroleum and shale oils, namely, Petroleum Prospecting Act 1926; Power Alcohol Bounty Act 1926; Shale Oil Bounties Act 1910-1923 Oil Agreement Act 1920-1924 Spirits Act 1906-1923 Customs Tariff 1921 (items 3 (F), 220 (c), 230); Excise Tariff 1921 (item 2 (M) ).
2. In the year 1925 the Legislature of the State of South Australia passed a statute called the Taxation (Motor Spirit Vendors) Act 1925 (No. 1681) which provided (inter alia) for the payment to the Commis- sioner of Taxes for South Australia by every vendor of motor spirit tax calculated at the rate of three pence
vehicle on any street or road within for every gallon of motor spirit sold
the State shall pay a tax calculated at by him within the State, &., and
the rate of three pence per gallon of (3) authorizes every vendor who
motor spirit SO purchased or obtained delivers motor spirit after the com-
and SO used by him. By sec. 8 pro- mencement of the Act in pursuance of
vision is made for the payment by the a contract made before that time to
Commissioner of Taxes to any person add three pence per gallon to the price
using motor spirit for any purpose agreed to be paid. By sec. 5 it is pro-
other than the propelling of a motor vided that the vendor may obtain a
vehicle on roads or streets within the refund from the Commissioner of Taxes
State of three pence per gallon of the in respect of spirit sold by him for
spirit so used. By sec. 16 it is provided which he has not been paid. By sec.
that all money received by the Commis- 7 it is provided that every person who
sioner of Taxes in payment of tax due uses any motor spirit, which he has
under the Act shall be paid into the purchased or obtained outside the State,
Main Roads Fund established under for the purpose of propelling any motor
the Highways Act 1925.