
Case law and codified law are two distinct concepts within the legal system. Case law refers to rulings made by judges in legal proceedings, which serve as precedents for future cases. These rulings are based on the interpretation of existing laws and provide guidance on how they work in practice. Codified law, on the other hand, is the process of collecting and organising these laws, often by subject, to create a comprehensive legal code. While case law establishes precedents, codified law represents the full body of law in a given area. In this way, case law and codified law are interconnected, with case law influencing the development of codified law and vice versa. Understanding the interplay between these two concepts is crucial for predicting how the law will evolve and be applied in future cases.
| Characteristics | Values |
|---|---|
| Definition | Case law refers to rulings made by judges in actual legal proceedings. |
| Codification is the process of collecting and restating the law of a jurisdiction in certain areas, usually by subject, forming a legal code. | |
| Basis | Case law is based on precedents, or the judicial decisions from previous cases. |
| Codified law is based on the full body of law on a given area. | |
| Function | Case law provides interpretations of how a law operates in the real world. |
| Codified law provides the rules and regulations that govern a specific area of law. | |
| Interaction | Case law and codified law build on each other to give a full picture of the legal system. |
| Codified law incorporates rulings from case law, and subsequent court rulings inform changes to codified law. | |
| Examples | Case law examples include Dobbs v. Jackson Women's Health Organization and New York State Rifle and Pistol Association v. Bruen. |
| Examples of codified law include the Uniform Commercial Code, the California Civil Code, and the Consolidated Laws of New York. |
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What You'll Learn

Case law and codified law build on each other
Case law and codified law are two distinct but complementary concepts within legal systems. Case law refers to the rulings and interpretations made by judges in specific legal proceedings, creating precedents that guide future decisions. On the other hand, codified law involves the systematic collection and organisation of laws on a particular subject, resulting in a comprehensive legal code.
While they differ in nature, case law and codified law are not mutually exclusive. Instead, they work in tandem and build on each other to shape the overall legal landscape. For instance, in common law jurisdictions, case law forms the basis of legal reasoning, with judges interpreting statutes and applying precedents from past decisions. This case law then informs the development of codified law, which consolidates and restates the established principles in a specific area of law.
The interaction between case law and codified law is dynamic and reciprocal. Codified law provides the framework within which judges interpret and apply the law, drawing on case law precedents to guide their rulings. These rulings, in turn, contribute to the evolving body of case law, which may lead to the refinement or reinterpretation of existing codified law. This iterative process ensures that the law remains responsive to changing circumstances and evolving societal needs.
A notable example of the interplay between case law and codified law is the Dobbs v. Jackson Women's Health Organization case in the United States. This case law impacted codified law by overturning Roe v. Wade and holding that abortion legality is a state-level decision. As a result, states had to incorporate the ruling into their codes, and subsequent state-level court rulings further informed and refined these codes.
In summary, case law and codified law are integral components of legal systems, each contributing to and shaping the other. Their interplay ensures that the law remains dynamic, adaptable, and reflective of judicial interpretations and societal changes. Understanding this relationship is crucial for legal practitioners and scholars alike, as it provides insight into the complex and evolving nature of the law.
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Case law is based on precedent
In common law countries, such as the United States, United Kingdom, Canada, Australia, and others, case law is used for judicial decisions made by selected appellate courts, courts of first instance, agency tribunals, and other adjudicatory bodies. These decisions create a precedent that lower courts must follow when deciding similar cases, ensuring consistency in the application of the law.
For example, in England, the High Court and the Court of Appeals are bound by their previous decisions. However, there are exceptions, as seen in R v Jogee, where the Supreme Court of the United Kingdom ruled that the lower courts had misapplied the law for nearly 30 years. While higher courts typically don't have direct oversight over lower courts, they can overrule previous case law by setting a new precedent, as seen in the evolutionary process of Lord Denning's concept of estoppel in the High Trees case.
Case law and codified law work together to provide a full picture of a legal system. Codified law is the process of collecting and restating the laws of a jurisdiction, usually by subject, to form a legal code or codex (book) of law. While codified law represents the full body of law in a specific area, case law provides the rulings and interpretations that guide how that law is applied in practice.
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Codified law is a collection of laws
The first permanent system of codified laws emerged in imperial China with the Tang Code in AD 624, which formed the foundation of Chinese criminal law. This was eventually replaced by the Great Qing Legal Code, which was abolished in 1912 following the Xinhai Revolution and the establishment of the Republic of China. The new laws of the Republic of China drew inspiration from the German Bürgerliches Gesetzbuch.
Another influential example of codified law is the French Napoleonic Code of 1804, which heavily influenced the legal systems of numerous countries. The movement toward codification gained momentum during the Enlightenment and was implemented in several European countries during the late 18th century. However, it became widespread only after the enactment of the French Napoleonic Code.
In the United States, an example of codified law is the Uniform Commercial Code (UCC), which provides rules for various commercial contracts. States that adopt the UCC utilise it as an authoritative source, along with new court rulings or case law, to guide their legal systems. Case law refers to rulings made by judges in legal proceedings, which become part of the interpretation and application of laws in practice. While judges do not create laws, their interpretations provide guidance on how the laws will work in reality.
Thus, codified law and case law work together to provide a comprehensive understanding of a legal system. While codified law represents the collection of laws in a specific area, case law provides the interpretations and rulings that shape how these laws are applied and understood in practice.
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Common law systems and stare decisis
Case law, also used interchangeably with common law, is a law based on precedents, or the judicial decisions from previous cases, rather than law based on constitutions, statutes, or regulations. Common law systems are in place in the United Kingdom, United States, Canada, Australia, New Zealand, South Africa, Singapore, Ireland, India, Pakistan, Bangladesh, Sri Lanka, Nepal, Bhutan, Israel, and Hong Kong.
In common law systems, courts decide the law applicable to a case by interpreting statutes and applying precedents that record how and why prior cases have been decided. Common law systems follow the doctrine of stare decisis, by which most courts are bound by their own previous decisions in similar cases. Stare decisis is derived from the Latin phrase "stare decisis et non quieta movere", which means "to stand by the decided matters and not to disturb the undisturbed". In other words, stare decisis holds that courts and judges should honour precedent, or the decisions, rulings, and opinions from prior cases.
Stare decisis is a foundational concept in the American legal system, assuring that the law won't change randomly and allowing society to assume that fundamental beliefs are based on the law rather than on people's preferences. It fosters predictable, unbiased, and consistent development of legal principles, increasing reliance on judicial decisions and adding to the actual and perceived integrity of the judicial process. Vertical stare decisis is deeply entrenched in the American legal system, with the idea that the decisions of higher courts take precedence over the decisions of lower courts. This is contrasted with horizontal stare decisis, which holds that prior decisions made by courts at a particular appellate level should provide some precedent for cases heard by courts of the same appellate level.
While stare decisis is a fundamental principle, there are nuances and limits in the way it is applied. For example, judges may offer reasons or legal nuances to avoid following precedential decisions or to outright overturn prior rulings. This may occur when judges believe that developments or trends in legal reasoning render the precedent unhelpful. Additionally, while higher courts do not have direct oversight over lower courts, they can overrule judgments of lower courts if those judgments are appealed to the higher courts.
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Codified law in civil law jurisdictions
Codification is the process of collecting and restating the laws of a jurisdiction, usually by subject, to form a legal code or codex (book) of law. It is one of the defining features of civil law jurisdictions. Civil law systems are codified and take their origins from Roman law.
Civil law jurisdictions rely on codification. Notable early examples of civil codes include the Statutes of Lithuania in the 16th century, the French Napoleonic Code of 1804, and the German Bürgerliches Gesetzbuch, which inspired the laws of the Republic of China. The movement toward codification gained momentum during the Enlightenment and was implemented in several European countries during the late 18th century. However, it became widespread only after the enactment of the French Napoleonic Code.
In civil law systems, there is generally a written constitution based on specific codes, such as civil codes, corporate law, administrative law, tax law, and constitutional law. These codes enshrine basic rights and duties. While administrative law is usually less codified, and administrative court judges tend to behave more like common law judges, legislative enactments are considered binding for all. There is little scope for judge-made law in civil law courts, and constitutional and administrative courts can nullify laws and regulations.
In contrast to civil law systems, common law systems, such as those in the United Kingdom, the United States, Canada, and other former British colonies, follow the doctrine of stare decisis, where courts interpret statutes and apply precedents from previous cases. While case law can impact codified law, with states incorporating rulings into their codes, common law systems do not rely solely on codification. Instead, they may involve judge-made law or uncodified statutes enacted by the legislature.
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Frequently asked questions
Case law refers to rulings made by judges in legal proceedings. These rulings are based on precedents, or judicial decisions from previous cases, and are used as guidance for future cases.
Codified law and case law build on each other to give a full picture of the legal system. Codified law represents the full body of law on a given area, while case law provides interpretations and additional guidance based on judicial rulings.
Case law can be applied to ongoing adjudication in some jurisdictions, such as criminal proceedings or family law. However, it is important to note that the applicability of case law may vary depending on the specific legal system and the type of proceeding.
Yes, case law can be overturned or distinguished if it is deemed inconsistent with subsequent authority or if there is a material difference between the facts of the cases. Higher courts generally do not have direct oversight over lower courts, but they can overrule judgments of lower courts through the appeals process.
Common law systems, such as those in the United Kingdom and the United States, rely on case law and judicial precedents. Codification in common law involves converting judge-made law and uncodified statutes into statute law. In contrast, civil law jurisdictions, such as those influenced by the Napoleonic Code, are characterized by their reliance on comprehensive legal codes.











































