the customs, the State Governments are ex necessitate out of that
field, which knows as occupants one government and one people,
the Australian Government, and the Australian people who give it
life" (1). This statement is, it seems to me, applicable to a law
made by the Commonwealth under concurrent powers: such a
law is paramount over State law which is inconsistent with it.
O'Connor J. said: - Such being the principle upon which the
tule of construction rests, it is obviously applicable only in the
determination of the question whether the King, as representing
the community whose legislation is under consideration, is or is
not bound by enactment. It cannot be applied to determine
whether the enactment binds the King as representing some other
community. It is applicable in the inquiry whether a Common-
wealth Act binds the King as representing the Commonwealth,
But where the inquiry is whether the Commonwealth Act binds
the King as representing one of the States it can have no
relevancy. Coming now to the application of the principle of
construction to the enactments in question, it would follow that,
although that principle may be used to ascertain whether the King,
as representing the Commonwealth, is bound by the Customs Act,
it cannot be used in the inquiry whether the King, as representing
the community of New South Wales, is bound by the Constitution
or by the Customs Act. In such a case the obligation of the Crown
as representing the community of New South Wales to obey the
Constitution and laws, such as the Customs Act passed under its
authority, depends upon entirely different considerations" (2).
Isaacs J., as he then was, said : - '" No doctrine of law, however
applicable to the purely unitary form of government, can, if incon-
sistent with the great, essential and dominant purpose of the Federal
Constitution, be allowed to prevail. Any theory, therefore, is
inadmissible which would permit the States, merely because allegiance