What is the role of international law for Australia?

• A. It guides how Australia behaves in international relations and relates to treaties and obligations.
• B. It dictates domestic tax policy.
• C. It determines the voting age.
• D. It controls state police powers.

Answer: (A)

International law provides the rules that countries agree to follow in their dealings with one another. For Australia, this means shaping how it acts on the world stage—its diplomacy, trade, security, and human rights commitments—through treaties and customary obligations. When Australia signs international agreements, it accepts certain duties and standards, and domestic law can then be used to implement those obligations. This is why the main role is about guiding Australia’s behaviour in international relations and relating to treaties and obligations. It doesn’t set domestic tax policy, determine the voting age, or control state police powers, which are decided by domestic law within Australia. Those areas would only be influenced by international law if Australia chooses to implement specific international obligations at home.