
Australia's legal system is a complex framework comprising federal, state, territorial, and local council laws, as well as common law precedents. The country's common law is derived from English common law, which was introduced during colonisation and has since diverged, with Australian courts no longer bound by UK decisions. The Australian Constitution, effective since 1901, establishes a bicameral legislature and outlines the roles of the governor-general and the monarch. Australia's common law system operates across the states and territories, with judges' decisions in court cases setting precedents for future rulings. This system provides a foundation for various areas of law, including environmental and human rights. Notably, Australia lacks a Constitutional Charter or Bill of Rights, distinguishing it from other common law countries.
| Characteristics | Values |
|---|---|
| Origin | English common law |
| Influence | UK common law decisions |
| Federalism | Bicameral legislature |
| Legal Institutions and Traditions | Derived from English legal system |
| Indigenous Laws | Superseded by English law |
| Constitutional Chapters | Trade, court system, federal-state-territory relations |
| Legislative Powers | States, territories, federal government |
| Law Formulation | Multiple levels: federal, state, territorial, local councils |
| Treaty Influence | Controversial, but valid interpretive aid |
| Human Rights | Protected by common law courts |
| Environmental Law | Native title recognised by High Court |
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What You'll Learn

Influence of UK common law
Australia's common law system originated in the system of common law in the UK. Despite Australia's independence from the UK, the influence of UK common law decisions remain influential in Australian courts.
The legal system of Australia includes a written constitution, unwritten constitutional conventions, statutes, regulations, and the judicially determined common law system. Its legal institutions and traditions are substantially derived from English law, which superseded Indigenous Australian customary law during colonisation.
The Australian Constitution, effective since January 1, 1901, establishes a bicameral legislature, consisting of the House of Representatives and the Senate, along with the role of the governor-general as the monarch's representative. The Australian Constitution sets out a federal system of government, with a national legislature that has the power to pass laws of overriding force on certain topics. The states are separate jurisdictions with their own court systems and parliaments and are vested with plenary power.
The laws of Australia's federal government, state and territorial governments, local councils, and common-law precedents together form the collective legal system of Australia. The top level of Australian lawmaking is the federal government, specifically the Australian Parliament. It consists of the House of Representatives, the lower house, and the Senate, the upper house.
Although the UK's influence on Australia's common law has been significant, there exists substantial divergence between each system. Until 1963, the High Court regarded decisions of the House of Lords as binding, and there was substantial uniformity between Australian and English common law. In 1978, the High Court declared that it was no longer bound by the decisions of the Judicial Committee of the Privy Council.
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Indigenous Australian customary law
Australian common law does not traditionally incorporate Indigenous customary law. During the colonial era, European settlers assumed the legal fiction of Australia as terra nullius, or vacant land, and Australian courts ignored Indigenous lore. However, in the Mabo decision of 1992, post-colonial law recognised Indigenous lore as giving rise to valid legal claims, and the legal fiction of terra nullius was discarded.
Indigenous customary law is not uniform across Australia and differs between language groups, clans, and regions. Within some Aboriginal Australian communities, the words "law" and "lore" are used to differentiate between the Indigenous and post-colonial legal systems. Lore, learned from childhood, dictates how to interact with the land, kinship, and community. It is intertwined with cultural customs, practices, and stories from the Dreamtime. Lore is passed down through the generations via songlines, stories, and dance, transmitted through oral tradition.
There is no systematic account, manual, or handbook of Indigenous Australian customary laws, and they are often intertwined with religious beliefs and rules of etiquette. However, legislative bodies in the late 20th century and beyond have investigated incorporating Indigenous laws more formally into post-colonial legal systems. For example, in the Northern Territory, some statutes and courts make explicit reference to customary law when identifying relationships and social expectations. In 2020, the Queensland Government introduced a bill to legally recognise the Torres Strait Islander practice of traditional adoptions (kupai omasker), which was passed as the Meriba Omasker Kaziw Kazipa Act 2020.
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Common law and human rights
Australia's common law was inherited from the United Kingdom. Common law is often called 'judge-made' law, distinguishing it from laws made in Parliament. Despite the absence of a Constitutional Bill of Rights, common law courts in Australia have the power to provide significant protection of human rights principles, including the rule of law.
The Australian Human Rights Commission Act 1986 details the powers and functions of the Australian Human Rights Commission, which is responsible for monitoring and promoting human rights protection. The Commission also has responsibilities under the Racial Discrimination Act 1975, the Sex Discrimination Act 1984, the Disability Discrimination Act 1992, and the Age Discrimination Act 1996.
The principle of non-discrimination is fundamental to human rights law: all human rights should be enjoyed by everyone, regardless of factors such as race, sex, or disability. While common law recognition of rights generally lacks the provisions contained in human rights treaties, it does contain concepts intended to provide protection for children and people with disabilities in some areas.
The Australian government is committed to protecting and promoting traditional rights and freedoms, including freedom of speech, opinion, religion, association, and movement. These rights and freedoms are protected by the common law principle that legislation should not infringe on fundamental rights and freedoms unless the legislation expresses a clear intention to do so and the infringement is reasonable.
In the context of environmental law, common law rules have been a constraint on public interest litigation to protect the environment. However, native title, recognised by the High Court as part of common law in Mabo v Queensland (No 2) (1992), has immensely important implications for the environmental legal system.
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Common law and the environment
Australia's common law is based on the inherited common law tradition from England, which Australia shares with Canada, New Zealand, and the USA. Unlike other common law countries, Australia does not have a Constitutional Charter or Bill of Rights. Despite this, common law courts in Australia have the power to provide significant protection of human rights principles, including the rule of law.
Common law provides important foundational principles for the Queensland environmental legal system. The recognition of native title by the High Court in Mabo v Queensland (No 2) (1992) and its application by other courts demonstrates this. In this case, Brennan J defined "native title" as:
> The term ‘native title’ conveniently describes the interests and rights of indigenous inhabitants in land, whether communal, group or individual, possessed under the traditional laws acknowledged by and the traditional customs observed by the indigenous inhabitants.
The Federal Court further clarified native title in the Croker Island Case, where the native title and interests of the claimant group included the right to fish, hunt, and gather within the claimed area to satisfy their personal, domestic, or non-commercial communal needs, including observing traditional, cultural, ritual, and spiritual laws and customs.
Common law also establishes the "causes of action" relevant to environmental issues, which include private nuisance, public nuisance, riparian user rights, negligence, and trespass. For example, in Burnie Port Authority v General Jones Pty Ltd (1994), the rule of strict liability in Rylands v Fletcher was abandoned in favor of general negligence principles.
While common law permeates the Australian environmental legal system, there is concern that national and sub-national laws are not adequately protecting the environment. Australia ranks fourth in the world for extinct and critically endangered species, first for mammalian extinctions, and is facing an extinction crisis. Environmental laws have been criticised as endorsing a "licence to pollute" and managing competing priorities rather than protecting environmental values.
The right to a healthy environment is not enshrined in Australian federal laws or the Constitution, and there is no explicit recognition that other species or ecosystems have the legal right to exist and thrive. However, various states have introduced legislation to recognise and protect human rights, and there is a growing dialogue around the legal protection of human rights in Australia.
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Common law and personal liberty
Australia's legal system is a complex framework shaped by its federal structure and historical roots in British common law. Australia's common law is based on English common law, which superseded Indigenous Australian customary law during colonisation. The Australian Courts Act 1828 ensured that all English common and statute law up to 1828 was to be applied in New South Wales and Tasmania, and later in Victoria and Queensland. The reception of English law in Western Australia and South Australia was deemed to have occurred in 1829 and 1836, respectively.
The Australian legal system includes a written constitution, unwritten constitutional conventions, statutes, regulations, and the judicially determined common law system. The country's common law is the same across all states and territories, and it is based on the common law system of English law. In this system, laws are not exhaustively codified but are determined by the decisions of judges in court cases. These decisions become precedents that are expected to be honoured in future rulings.
The Australian Constitution, effective since January 1, 1901, establishes a bicameral legislature, consisting of the House of Representatives and the Senate, along with the role of the governor-general as the monarch's representative. The governor-general's role is largely ceremonial, and they must approve bills proposed in parliament before they become laws.
Personal liberty is a fundamental common law freedom. The right to personal liberty encompasses freedom from slavery and trafficking in persons. Common law principles contain concepts intended to provide protection for children and people with disabilities in some areas. For example, in environmental law, native title, as recognised by the High Court, is part of the common law. The concept of standing (the legal right to commence court action) has been a constraint on public interest litigation to protect the environment, but environmental legislation has provided widened standing to overcome this.
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Frequently asked questions
Australian common law is based on English common law.
In the late 1780s, the British Empire claimed Australia as a colony, and for the next 80 years, the British primarily used Australia as a penal colony. During this time, English common and statute law was applied in Australia, superseding Indigenous Australian customary law.
In Australia's common law system, laws are not exhaustively codified but are instead determined by the decisions of judges in court cases. These decisions become precedents that future judges are expected to honour.
The Australian Constitution, effective since 1 January 1901, establishes a federal system of government, with a national legislature that has the power to pass laws on certain topics. The Constitution can only be changed by a nationwide referendum or a vote by the people.
Australia is unusual among common law countries in not having a Constitutional Charter or Bill of Rights. However, common law courts have the power to protect human rights principles, including the rule of law, unless overridden by legislation.











































