
Session laws refer to all the laws passed during a particular session of Congress, published in chronological order. They are the initial publication of the laws passed in a legislative session and are usually the positive law form, meaning they are the determinative form of the law if there is a dispute about the actual language of the law passed. Codes, on the other hand, publish laws by topic or subject rather than chronologically. They are periodically updated with supplements or new editions to reflect changes, such as new laws, amendments, or repealed laws. Codes are also re-issued on a regular cycle to reflect session law changes.
| Characteristics | Values |
|---|---|
| Session laws | Laws enacted during a legislative session |
| Published in chronological order | |
| May be amended or repealed by a later session law | |
| Initial publication of laws passed in a legislative session | |
| Published in session law sets | |
| May include both public and private laws | |
| Published in Statutes at Large | |
| Codes | Publish laws by topic or subject |
| Periodically updated with supplements or new editions | |
| Reflect changes such as new laws, changes in existing laws, or deletion of repealed laws | |
| Re-issued on a regular cycle to reflect session law changes | |
| Contain the text of the law |
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What You'll Learn

Session laws are laws enacted during a legislative session
Session laws are published in Statutes at Large, in chronological order. For instance, Public Laws 112-1 through 112-75 are published in Part 1 of Volume 125 of Statutes at Large. Once a bill is enacted, it becomes a statute and is first published as a slip law, receiving either a Public Law Number or a Private Law Number. Public laws affect society as a whole, while private laws apply only to an individual or a small group.
Session laws are subject to repeal or amendment by later session laws. They are also referred to as acts and may include both public (laws of a general nature) and private laws. Session laws are the initial publication of the laws passed in a legislative session. They are usually the positive law form, meaning they are the determinative form of the law if there is a dispute about the actual language of the law passed by the legislature.
Session laws are published by the publisher of the annotated code for a jurisdiction. They usually contain a table at the back of the pamphlet to help determine whether a code or statute section has been affected by any recently enacted session laws.
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Session laws are published chronologically
The chronological publication of session laws is distinct from codes, which are arranged by topic or subject. Codes are updated periodically to reflect changes in the law, such as the addition of new laws, amendments, or the repeal of existing laws. Codes are also known as statutory compilations and are published by jurisdictions as official codes. These official codes are either published or sanctioned by the government and contain the text of the law, as well as brief editorial notes on the history of the statute.
Session laws, on the other hand, are the initial publication of the laws passed in a legislative session. They are subject to repeal or amendment by later session laws. Session laws are published in Statutes at Large, which is the official publication of Federal session laws. The Statutes at Large also include additional information, such as the Presidential Signing Statement and the number of the bill that was passed.
To find the current law on a particular topic for a specific jurisdiction, one should consult the code for that jurisdiction. Codes are updated to reflect changes in the law and are arranged by topic, making it easier to locate the current law on a given subject. Annotated codes, which are unofficial publications by private publishers, are also regularly updated and include interpretive and secondary materials, making them a preferred tool for statutory research.
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Codes are published by topic or subject
Codes, also known as statutory compilations, are published by topic or subject. They are arranged by topic so that related laws are grouped together. This is in contrast to session laws, which are published in chronological order. Codes are regularly updated to reflect changes in the law, such as the addition of new laws, amendments to existing laws, or the deletion of repealed laws. They are also periodically issued with supplements or new editions.
The United States Code (U.S.C.), for example, is a set of print volumes that serve as the official publication of the topical arrangement of federal statutes. The U.S.C. consists of 53 or 54 titles, each representing a topic. For instance, Title 17 (Copyrights) contains copyright statutes, and Title 18 covers crimes and criminal procedure. The sub-topics under each title are further organized into chapters, with each chapter containing individual sections. Sections grouped in the same chapter cover similar topics. For example, Chapter 3 of Title 17, titled "Duration of Copyrights," contains sections 301–305.
Codes are published by governments or private publishers. Official codes published or sanctioned by the government are known as "official codes." They contain the text of the law and brief editorial notes on the history of the statute. On the other hand, annotated codes are unofficial publications by private publishers. They are updated more frequently and include valuable research materials, such as references to court cases that have interpreted a code section, commentary, and scholarly references.
When a new law is passed, all its components are placed in the existing code in their appropriate places, following the topical arrangement scheme of the code. This process of incorporating new session laws into an existing code is called "codification." While the original language of the session law is generally preserved, it may be separated and integrated into different sections of the code to fit the topical arrangement. Minor adjustments may also be made to ensure the language from the session law is coherent with the existing code.
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Codes are regularly updated to reflect changes
Codes, on the other hand, are published by topic or subject, grouping related laws together. They are periodically updated with supplements or new editions to reflect changes, such as the addition of new laws, amendments to existing laws, or the deletion of repealed laws. This ensures that codes always contain the law currently in force in a particular jurisdiction.
The process of incorporating new session laws into an existing code is known as codification. During codification, the original language of the session law is generally preserved intact, but adjustments may be made to integrate it into the existing code coherently. Codes may also include editorial notes on the history of a statute, such as citations to the session law that enacted it and any subsequent laws that amended it.
Official codes are published or sanctioned by the government and are re-issued on a regular cycle to reflect session law changes. Annotated codes, by contrast, are unofficial publications by private publishers. They are updated more frequently and contain additional research materials, such as references to court cases that have interpreted a code section, commentary, and scholarly references.
Online versions of codes tend to be the easiest way to view the current version of the law, as changes are reflected in the text with little lag time.
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Session laws can be amended or repealed by later session laws
Session laws are the laws passed during a particular session of Congress. They are published in chronological order, in Statutes at Large, and are identified by a Public Law Number. Session laws are also referred to as acts and may include both public and private laws. Public laws are of a general nature, affecting society as a whole, while private laws apply to specific individuals or groups and are temporary.
Session laws are subject to change and can be amended or repealed by later session laws. This is an important aspect of the legislative process, as it allows for flexibility and the adaptation of laws over time. When a session law is amended or repealed, the original language may be preserved, but it is also subject to modification to fit the topical arrangement of the new law.
The process of incorporating new session laws into existing codes or statutory compilations is called codification. Codes are updated periodically to reflect these changes, including new laws, amendments, and repealed laws. They are arranged by topic or subject, rather than chronologically, to provide a practical method for locating the current law on a particular issue.
To determine whether a specific code or statute has been impacted by a recently enacted session law, researchers can consult advance legislative services. These services provide tables or notes listing statutes that have been amended, repealed, or otherwise affected by new session laws. Online sources, such as uscode.house.gov, are often the easiest way to access the most current version of a law, as they reflect changes with little lag time.
In summary, session laws are the initial publication of laws passed during a legislative session, and they can be amended or repealed by subsequent session laws. Codes are the updated compilations of these laws, organised by topic, and they reflect the current law in force in a particular jurisdiction.
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Frequently asked questions
Session laws refer to all the laws passed during a particular session of Congress. They are published in chronological order in the Statutes at Large.
Codes, or statutory compilations, are publications that group laws by topic or subject rather than chronologically. They are regularly updated to reflect changes in the law.
Session laws are published in chronological order, whereas codes are arranged by topic, with related laws grouped together. Codes are updated to reflect changes in the law, while session laws provide a snapshot of the law as it was originally passed.
If you need to find the text of a specific law as it was originally enacted, you should consult a session law publication for the appropriate jurisdiction.
If you are looking for the current law on a particular topic for a particular jurisdiction, you should consult the code for that jurisdiction as it will be updated to reflect any changes in the law.
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