
Australia is a common-law jurisdiction, with a court system that originated in the common law system of English law. Common law in Australia is a collection of court decisions developed over hundreds of years by Australian superior courts, English courts, and the courts of other countries with similar legal systems. It is used by judges as a reference to guide them in making decisions about a particular case. The common law provides judges with years of precedents and wider common-law principles from similar cases to help them make their decisions.
| Characteristics | Values |
|---|---|
| Basis | Common law is a collection of court decisions developed over hundreds of years by Australian superior courts, English courts, and the courts of other countries with similar legal systems. |
| Influence | The Australian legal system is substantially derived from the English legal system, which superseded Indigenous Australian customary law during colonisation. |
| Consistency | Common law is the same across all states and territories in Australia. |
| Human rights | Common law courts have the power to provide significant protection of human rights principles, including the rule of law. |
| International law | Australian courts favour interpretations of statutes and subordinate legislation that accord with Australia's obligations under international treaties and conventions. |
| Legislative independence | In the last quarter of the 20th century, Australian common law began to diverge from English common law. Many English laws received in Australia have been repealed in state parliaments. |
| Precedent | Judges deciding cases refer to common law to ensure consistency with previous similar cases. |
| Statutory interpretation | When determining the meaning of an Act, a judge must engage in 'statutory interpretation' and consider the ordinary meaning of words, Parliament's intention, and the purpose of the Act. |
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What You'll Learn

Common law's divergence from English law
Common law in Australia is a complex and evolving system of law that forms the basis of the Australian legal system. It is derived from the English common law system, which was inherited from Britain during colonisation. However, over time, Australian common law has diverged and developed in ways that are unique to the country's legal landscape and societal needs.
While Australian common law is deeply rooted in English common law principles, there are several key ways in which it has diverged and developed its own distinctive features:
One significant area of divergence is in the interpretation and application of common law principles to modern societal issues and changing social values. Australia, as a sovereign nation, has the autonomy to interpret and adapt common law doctrines to suit contemporary contexts. For example, areas like tort law and contract law have seen significant developments and adaptations to address modern-day challenges and issues.
Another factor contributing to the divergence is the influence of other legal systems and unique Australian legislation. The interaction of common law with other legal traditions, such as equity and statutory law, has led to the evolution of distinct Australian legal doctrines. For instance, the development of native title law in Australia, recognising Indigenous Australians' traditional rights to land, is a unique aspect of Australian common law that has no equivalent in English law.
The Australian High Court, as the highest court in the land, plays a pivotal role in shaping and interpreting common law. Its decisions set binding precedents that can deviate from English interpretations, establishing an independent and distinctive Australian common law jurisprudence. The High Court has, on numerous occasions, departed from English common law, setting new directions in areas such as constitutional law, administrative law, and criminal law.
Additionally, the federal nature of the Australian political system has led to variations in the application and interpretation of common law across different states and territories. Each state and territory has its own court system, contributing to the development of common law at a local level, which can result in subtle differences in legal doctrines and principles across the country.
Furthermore, the social, cultural, and political differences between Australia and England have inevitably influenced the development of common law. Australia's unique history, demographics, and societal values have shaped legal interpretations and adaptations to suit the needs and aspirations of its diverse population. This is particularly evident in areas of family law, property law, and criminal law, where Australian courts have often taken a more progressive approach compared to their English counterparts.
In conclusion, while Australian common law is founded on English common law principles, it has evolved and diverged significantly over time. This evolution is driven by various factors, including judicial interpretation, legislative intervention, social and political influences, and the unique federal structure of the Australian legal system. The ongoing development of Australian common law ensures that it remains dynamic, adaptable, and responsive to the needs of a modern and independent nation.
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Indigenous customary law
Common law in Australia was introduced through the colonisation of Australia by the British. The country's common law is the same across all states and territories. However, Indigenous Australian customary law, or Indigenous Australian customary lore, refers to the legal systems and practices unique to Indigenous Australians, including Aboriginal and Torres Strait Islander people.
Indigenous Australian customary law is not uniform across Australia and varies between language groups, clans, and regions. It developed over time from accepted norms within Indigenous societies, regulating human behaviour and relationships, and mandating sanctions for misdeeds. These laws are often intertwined with cultural customs, stories, and practices, passed on intergenerationally through oral traditions, songlines, stories, and dance.
Within some Aboriginal Australian communities, the words "law" and "lore" are differentiated, with "law" referring to the legal system introduced during colonisation, and "lore" referring to the Indigenous customary system. Lore dictates the rules for interacting with the land, kinship, and community.
In the post-colonial era, Indigenous customary law has only been recognised to a limited degree by Australian courts. However, legislative bodies have investigated incorporating Indigenous laws more formally into post-colonial legal systems. In 1992, post-colonial law recognised Indigenous lore as giving rise to a valid legal claim in the Mabo decision, acknowledging customary legal rights to land. In addition, the 1986 Australian Government report acknowledged the existence of Indigenous customary lore, despite not finding any codified versions.
In the Northern Territory, some statutes and courts refer explicitly to customary law when identifying relationships and social expectations. On July 17, 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
Human rights are recognised and protected across Australia through a range of federal and state laws, the Australian Constitution, and the common 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 various anti-discrimination laws, such as the Racial Discrimination Act 1975 and the Sex Discrimination Act 1984.
Common law, or 'judge-made' law, is a significant source of rights in Australia. It is distinct from laws made in Parliament and was inherited from the United Kingdom, with some rights originating from decisions made in British courts before Australia's legal system became independent. Common law principles contain concepts that provide protection for children and people with disabilities, and it recognises the right to privacy, including intimate behaviour between consenting adults.
While Australia does not have a Bill of Rights, its Constitution contains five explicit individual rights. The High Court has also found that additional rights may be necessarily implied by the language and structure of the Constitution. For example, in 1992, the Court decided that Australia's form of parliamentary democracy requires a degree of freedom for individuals to discuss and debate political issues.
In interpreting laws made by Parliament, Australian courts may consider international treaty obligations, including human rights treaties. This is particularly relevant when there is ambiguity in the legislation, and it reflects the presumption that Parliament does not intend to limit the fundamental rights of Australians.
The Australian Parliament has also passed laws to fulfil the country's human rights obligations, including those related to non-discrimination and the protection of vulnerable groups. Despite Australia's strong record on human rights, it is recognised that violations do occur, and some individuals are denied their basic rights due to their race, sex, disability, or other factors.
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Common law in environmental issues
Common law in Australia provides important foundational principles for the country's environmental legal system. While most environmental law is contained in legislation, common law continues to shape the Australian environmental legal system.
One of the main ways in which common law impacts environmental issues in Australia is by providing the grounds for causes of action, i.e., the reasons why a person can sue another in court. These causes of action relevant to environmental issues include private nuisance, public nuisance, riparian user rights, and negligence. For example, private nuisance covers unreasonable interference with the use of property, including due to smoke, noise, or vibration from a neighbour’s property. Public nuisance, on the other hand, involves unreasonable interference with a public right, such as pollution, where the person affected has suffered damage greater than the general public.
Common law also plays a role in the concept of standing, which refers to the legal right to commence court action. While environmental legislation has widened standing to protect the environment, common law rules can still pose an obstacle in public interest litigation.
Additionally, the recognition of native title by the High Court, as seen in Mabo v Queensland (No 2) (1992), has significant implications for the environmental legal system. Native title encompasses the interests and rights of indigenous inhabitants in land, including communal, group, or individual rights, recognised under traditional laws and customs.
Furthermore, common law principles have evolved over time, as seen in Burnie Port Authority v General Jones Pty Ltd (1994), where the rule of strict liability in Rylands v Fletcher was abandoned in favour of general negligence principles.
While common law plays a role in environmental issues, Australia's environmental protection laws are primarily established at the Commonwealth and state or territory levels. The Commonwealth legislation, such as the Environmental Protection and Biodiversity Conservation Act 1999 (EPBC Act), addresses matters of national environmental significance, including world heritage sites, nuclear activity, and the marine environment. State and territory authorities regulate pollution control, contamination, hazardous materials, waste disposal, and biodiversity protection.
In conclusion, common law in Australia provides important principles that shape the country's environmental legal system, particularly in areas such as causes of action, standing, native title, and evolving interpretations of negligence. However, the majority of environmental laws are now contained within legislation enacted by the Commonwealth, states, and territories, each with their own environmental protection authorities.
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The doctrine of precedent
The Australian legal system is based on the common law system of English law, which was introduced during the colonisation of Australia by the British. The doctrine of precedent is a fundamental aspect of this system.
The Australian court system has a hierarchical structure, with the High Court of Australia as the highest court. This means that the decisions of the High Court are binding on lower courts, and when it makes a novel decision, it establishes a new legal precedent. For example, the Mabo decision (Mabo v Queensland (No 2) [1992]) is a well-known instance of the High Court setting a new precedent. If a lower court judge's decision is not consistent with an established precedent, they must provide a reason for deviating from it.
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Frequently asked questions
Common law in Australia is a collection of court decisions developed over hundreds of years by Australian superior courts, English courts, and the courts of other countries with similar legal systems.
When courts interpret laws made by parliaments or consider cases where no laws exist, they create new laws by making decisions and providing reasons for them. These decisions are then used as a reference for future cases of a similar nature.
The Australian legal system, including its common law, is substantially derived from the English legal system. During colonisation, English common law superseded Indigenous Australian customary law, which varied between language groups, clans, and regions.
Statute law refers to written laws created by parliaments, while common law is based on judicial precedent and decisions made by judges in previous cases.
Some examples of common law principles in Australia include private nuisance, public nuisance, riparian user rights, negligence, and trespass. These principles provide grounds for legal action in areas such as environmental law.



































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