International law and Australian law

The Australian legal system is not an island, and Australian law has felt the influence of law and legal ideas from other jurisdictions, particularly other common law countries. Australian law has also been shaped by public international law both directly and indirectly and this interaction has become increasingly important as the scope and content of international law have grown. The relationship between Australian law and international law is mediated by Australia's constitutional framework in which the separation of powers between the executive, legislature and the courts holds central place. Unlike the constitutions in many other legal systems, the Australian Constitution does not address the relationship between international and domestic law, and most of the relevant legal principles are to be found in the common law. This chapter examines how each arm of government in Australia has engaged with international law, identifying areas where the relationship is well settled (as it is in relation to treaties) and areas where there remains some uncertainty (as in relation to customary international law).