In a federal system there is a constant need to resolve problems created by conflicting provisions of laws enacted by. the federal legislature and those enacted by a state or provincial legislature. In the case of a unitary system it is merely the question of a later statute conflicting with an earlier statute enacted by the same legislature, and in such an instance, the conflict is resolved by regarding the earlier law as having been impliedly repealed by the later law.
In the Australian federal system the conflict is resolved by resorting to the express provisions of s 109 of the Commonwealth Constitution, which reads as follows:
When a law of a State is inconsistent with a law of the Commonwealth, the latter shall prevail, and the former shall, to the extent of the inconsistency, be invalid.