
Statutory interpretation is the process by which courts interpret and apply legislation. The exercise of judicial power often requires that courts construe statutes to apply them to specific cases and controversies. Judicial interpretation of a statute is authoritative in the matter before the court and may guide courts in future cases. The methodologies and approaches taken by the courts in interpreting meaning can also help guide legislative drafters, legislators, implementing agencies, and private parties. In some circumstances, the Court subordinates the general, linguistic canons of statutory construction, as well as other interpretive principles, to overarching presumptions that, unless rebutted, favor particular substantive results.
| Characteristics | Values |
|---|---|
| Statutory interpretation | The process by which courts interpret and apply legislation |
| Judicial power | Vested in one Supreme Court and in such inferior courts as Congress may establish |
| Supreme Court | Created by the federal government, with judges appointed by the President |
| Federal judiciary | Large and powerful, with about 800 federal judges |
| Judges | Have lifetime tenure and are compensated accordingly |
| Legislative history | May be considered to clarify ambiguous text |
| Canons of construction | Common-sense guidance for courts in interpreting statutes |
| Deference canons | Instruct the court to defer to the interpretation of another institution, such as an administrative agency or Congress |
| Statutory construction | The specific controls over the general |
| Statutory application | Presumed to apply prospectively |
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What You'll Learn

Statutory interpretation
The exercise of judicial power often requires that courts construe statutes to apply them in concrete cases and controversies. Judicial interpretation of a statute is authoritative in the matter before the court and may guide courts in future cases. The methodologies and approaches taken by the courts in interpreting meaning can also help guide legislative drafters, legislators, implementing agencies, and private parties. Interpretive methods that emphasize the primacy of text and staying within the boundaries of statutes themselves to discern meaning are "textualist". Other approaches, including "intentionalism", are more open to taking extrinsic considerations into account. For example, some Justices may be willing to look at legislative history to clarify ambiguous text.
There are several commonly applied rules of statutory construction. For instance, if a statute can be interpreted in two ways, one of which is constitutional and the other unconstitutional, the court will choose the constitutional interpretation. Statutes are also to be read as a whole and in context, and the court is to give effect to every word of the statute. In addition, the specific controls over the general. That is, if there is a conflict between two statutory provisions, one of which is a general statement and the other a specific statement, the court will apply the more specific statement as an exception to the general statement.
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Canons of construction
There are several canons of construction that are commonly applied. For example, the canon of "expressio unius est exclusio alterius" dictates that the express mention of one thing excludes all others. When a statute includes a list of specific items, that list is presumed to be exclusive, and the statute only applies to the listed items. Another example is the canon of "ejusdem generis", which interprets words or phrases of the same kind or nature similarly. This canon was applied in the case of Continental Can Co., Inc. v. Chicago Truck Drivers, Helpers & Warehouse Workers Union, where the court interpreted the phrase "constraint incidental to release on bail" similarly to "general supervision of a person on probation or parole" to encompass defendants who were released from jail but not fully released on bail.
The specific controls over the general is another canon of construction. If there is a conflict between two statutory provisions, one specific and one general, the court will apply the more specific statement as an exception to the general statement. However, if the general statute was enacted more recently and the General Assembly intended it to apply, the court will apply the more general statute.
In some circumstances, the court may subordinate the general, linguistic canons of statutory construction to overarching presumptions that favor particular substantive results. These "substantive" canons of construction are derived from the Constitution, federalism, judicial administration, and ordered governance. For example, the canon of "in pari materia" dictates that statutes are to be read as a whole and in context, and the court should give effect to every word of the statute if possible.
The dominance of textualism in statutory interpretation emphasizes reliance on the text of statutes as a starting point. However, critics argue that words lack intrinsic meaning and that it is necessary for courts to examine additional sources beyond the text. Advocates know that to win a case about the meaning of a statute, they must begin with the text of the statute.
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Legislative history
The legislative history of judicial interpretations of statutes and constitutional provisions is a complex and evolving topic. Interpretive methods can vary, with some emphasising the primacy of text and staying within the boundaries of the statute itself to discern meaning, known as a "textualist" approach. Other methods, such as "intentionalism", take into account extrinsic considerations, including legislative history, to clarify ambiguous text.
In the United States, the judicial interpretation of statutes is authoritative in the matter before the court and may guide future cases. The Supreme Court's approach to statutory interpretation focuses on the text itself, with the power to construe statutes vested in the federal legislative branch, as outlined in Article I, Section 1 of the Constitution. This process is detailed in Article I, Section 7, which outlines the passage of legislation through both houses and the potential for presidential approval or veto override.
The methodologies and approaches used by courts in interpreting statutes can guide legislative drafters, legislators, implementing agencies, and private parties. Canons of construction, or interpretive rules of thumb, aid courts in determining the meaning of legislation. These canons can include substantive canons, such as the avoidance of constitutional issues, and deference canons, which instruct the court to defer to the interpretation of another institution, such as an administrative agency or Congress.
In cases of ambiguity, courts may refer to legislative history, including presidential signing statements, to clarify the legislature's intent. Legislative history can encompass the bill file, recorded debates, and comments made during committee hearings and readings. Statutes are generally presumed to be constitutional and applied prospectively, unless specified otherwise by the legislative body.
In other jurisdictions, such as Canada, statutory interpretation may involve interpreting legislation under federal or provincial residual jurisdiction when an area of law is not expressly mentioned in the Constitution. This differs from the approach in the United States, where it is presumed that states have authority over matters not enacted under the federal Constitution, unless state statutes conflict with federally established or recognised rights.
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Judicial independence
The Constitution of the United States guarantees certain rights, and judicial independence ensures these rights are protected by an impartial judiciary. Federal judges are appointed, not elected, freeing them from the pressures of running for office, fundraising, and taking partisan stands. This appointment process, along with protections such as life tenure, shields judges from political influence and allows them to make decisions based on the law rather than popular opinion.
However, judicial independence is not without its checks and balances. The Constitution outlines ways to prevent judicial power from being abused, such as impeachment for committing "high crimes or misdemeanors." Additionally, the Judicial Code of Conduct provides ethical guidelines for judges to maintain their independence and integrity, including recusing themselves from cases where personal bias may be perceived.
While judicial independence is essential, it must be balanced with judicial accountability, the duty to explain and justify decisions and address any resulting injustices or problems. This balance between independence and accountability is delicate, and an overly independent judiciary may struggle to function effectively within the government.
The development of judicial independence has been characterized by a cycle of influence between national and international law. This cycle has led to the spread and implementation of judicial independence principles globally, with the United Kingdom providing a notable example dating back to the Act of Settlement in 1701.
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Federal judiciary
The federal judiciary in the United States is a powerful entity, established by the Constitution and comprising the Supreme Court and inferior courts as ordained by Congress. Article III of the Constitution is clear that the federal judiciary, not the President, Congress, or the states, holds the "judicial Power of the United States." This power includes the interpretation and application of legislation, commonly known as statutory interpretation.
The federal judiciary's role in statutory interpretation is crucial. When a case involves a statute, judges interpret and apply the law, using various tools and methods such as traditional canons of statutory interpretation, legislative history, and purpose. The interpretation of a statute by the judiciary is authoritative in the matter before the court and may guide future cases. The courts interpret how legislation should be applied in a specific case, as no legislation addresses all matters unambiguously and specifically.
There are different approaches to statutory interpretation. Textualist methods emphasise the primacy of the text and staying within the boundaries of the statute itself to discern meaning. Other approaches, like intentionalism, consider extrinsic factors, such as legislative history, to clarify ambiguous text. Courts are bound to apply the plain language of a statute to fulfil the intent of the legislative body. However, if applying the plain language leads to an absurd result or contradicts the legislative body's obvious intent, or if the language is ambiguous, rules of statutory interpretation are employed to construe the statute.
Additionally, certain principles guide the federal judiciary in statutory interpretation. For example, if a statute can be interpreted in two ways, one constitutional and the other unconstitutional, the court will choose the constitutional interpretation. Statutes are also presumed to be constitutional and are interpreted harmoniously, avoiding conflicts whenever possible. The judiciary's interpretation of statutes is a dynamic process, influenced by various factors, and it plays a vital role in shaping the law and ensuring its application in specific cases.
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Frequently asked questions
Statutory interpretation is the process by which courts interpret and apply legislation. In other words, it is the act of clarifying the meaning of a statute and then applying it to a particular case or controversy.
Canons of construction are rules of thumb that help courts determine the meaning of legislation. They are common-sense guidelines that emerge from the common law process through the choices of judges. Examples include "expressio unius est exclusio alterius" (the express mention of one thing excludes all others) and the clear statement rule.
Interpretive methods vary, with some emphasising the primacy of the text (textualist) and others taking extrinsic considerations into account (intentionalist). Judges may refer to legislative history, including presidential signing statements, to clarify ambiguous text.
In federal systems, such as the United States, Australia, and Canada, statutory interpretation can vary. In the US and Australia, if legislation is not enacted under a specific federal provision, states typically have authority over the matter unless it conflicts with federally established rights. In Canada, unmentioned areas of law fall under federal or provincial residual jurisdiction.
The Supreme Court is the highest judicial authority in the United States, established by Article III of the Constitution. It has the final word in interpreting statutes and its interpretations are authoritative and may guide future courts.
























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