How does the Australian Constitution distribute powers between the Commonwealth and the states, and what are residual powers?

• A. All powers are shared equally between the Commonwealth and states.
• B. Power is exclusively held by the Commonwealth.
• C. States hold all legislative power.
• D. Some powers are exclusive to the Commonwealth; others to states; residual powers are not enumerated and are retained by the states.

Answer: (D)

The main idea is how power is allocated by the Constitution: some matters are given exclusively to the Commonwealth, other matters can be dealt with by both levels (concurrent powers), and any areas not specifically listed remain with the states as residual powers. The reason this option is the best is that the framers didn’t list every possible issue, so those not enumerated fall under state control. This creates a mix: exclusive Commonwealth powers for things like defence and currency; concurrent areas where both levels can legislate but Commonwealth law can prevail if there’s a conflict; and residual powers retained by the states because they aren’t enumerated in the Constitution. For example, criminal law and education are largely state matters, while defence is clearly Commonwealth.