| Melbourne Corporation v Commonwealth | |
| Date Decided: | 13 August 1947 |
| Full Name: | The Lord Mayor, Councillors and Citizens of the City of Melbourne v The Commonwealth and Another |
| Citations: | (1947) 74 31. |
| Opinions: | (5:1) Any Commonwealth law that is otherwise valid under a head of power in s51 or some other part of the Constitution will be invalid if it denies the existence or ability of a State to govern itself or the federal structure of the Commonwealth or singles out any one State |
Melbourne Corporation v Commonwealth, also known as the Melbourne Corporation case or the State banking case,[1] is an important case in Australian constitutional law. It stands for the proposition that there are limits on the scope of express Commonwealth legislative powers which can be implied from the federal character of the Constitution.
The Melbourne Corporation principle is an implied limit on Commonwealth legislative power under the Constitution of Australia.
The principle renders constitutionally invalid any Commonwealth law that is otherwise valid under a head of power in s51 or some other part of the Constitution if it:
This constitutional protection is one of the few reliable protections in the Australian Constitution against legislative and executive power, the other main protection being the Chapter III Separation of Powers Doctrine.
The recent case of Austin v Commonwealth[3] conflated the original two-limbed test of the original case into an expanded 1st limb so that a commonwealth law that affects a state's ability to administer itself is constitutionally invalid.