Statutory Research

Understanding Statutory Law

Statutes are laws enacted by legislative bodies—Congress at the federal level and state legislatures at the state level. Unlike case law, which develops through judicial decisions, statutory law represents the deliberate policy choices of elected representatives. Statutes are primary authority and, within their scope, generally take precedence over common law.

Statutory research is essential because statutes govern vast areas of modern legal practice:

• Regulatory frameworks — Tax, environmental, securities, and employment law are primarily statutory
• Criminal law — Crimes and punishments are defined by statute
• Procedural rules — Statutes of limitations, jurisdictional requirements, and procedural prerequisites
• Rights and remedies — Many civil rights, consumer protections, and remedial schemes exist only because statutes created them

The Codification Process

Understanding how statutes are organized requires knowing the difference between session laws and codes.

Session Laws

When a legislature passes a bill and the executive signs it, the result is a session law (also called a slip law or public law). Session laws are published in chronological order as they are enacted. At the federal level, individual laws are first published as slip laws, then compiled into the annual volumes of the Statutes at Large.

Session laws are the authoritative text of legislation as enacted. However, they are difficult to research because:

• They are arranged by date of enactment, not by subject
• Amendments appear in different volumes, years apart from the original law
• You cannot easily see the current, complete text of a law that has been amended multiple times

Codes

A code reorganizes session laws by subject matter. The codification process takes all current, in-force statutory provisions and arranges them topically. When a statute is amended, the code is updated to reflect the current text.

Codes provide significant advantages for researchers:

• Subject organization — Related provisions are grouped together
• Current text — You see the law as it exists today, incorporating all amendments
• Logical structure — Titles, chapters, and sections create a navigable hierarchy

Official vs. Unofficial Codes

Codes come in two varieties: official and unofficial. Understanding this distinction matters for citation and for knowing which version to trust.

Official Codes

An official code is published by or under the authority of the government. At the federal level, the United States Code (U.S.C.) is the official code. Most states also have official codes published by the state.

Characteristics of official codes:

• Published by the government or its designee
• Generally considered authoritative (though see note below about positive law)
• Updated less frequently—often only every few years for print versions
• Usually unannotated (no case summaries or cross-references)

Unofficial (Commercial) Codes

Unofficial codes are published by commercial publishers, primarily Thomson Reuters (West) and LexisNexis. These include:

• United States Code Annotated (U.S.C.A.) — West's annotated federal code, available on Westlaw
• United States Code Service (U.S.C.S.) — LexisNexis's annotated federal code, available on Lexis
• State annotated codes — Both publishers produce annotated versions of most state codes

The statutory text in unofficial codes is identical to the official code. What makes them invaluable are the annotations—editorial enhancements that dramatically improve research efficiency.

Annotated Codes and Their Value

Annotated codes are the workhorse of statutory research. While the statutory text is the same as in official codes, annotations transform a static code into a dynamic research tool.

Case Annotations

The most valuable feature of annotated codes is the case annotations—summaries of judicial decisions interpreting each statutory provision. These annotations:

• Summarize holdings from cases construing the statute
• Are organized by topic within each code section
• Include citations so you can read the full case
• Are updated regularly as new cases are decided

Case annotations reveal how courts have actually applied the statute. They show you whether a term has been interpreted broadly or narrowly, what defenses courts have recognized, and how different elements have been construed.

Cross-References

Annotated codes include extensive cross-references to related materials:

• Related statutes — Other code sections that interact with this one
• Regulations — Administrative rules implementing the statute
• Secondary sources — Treatises, encyclopedias, and practice guides discussing the statute
• Forms — Relevant legal forms and pleadings

Historical Notes

Historical notes document the statute's legislative history:

• Public law numbers for the original enactment and each amendment
• Effective dates of changes
• Prior versions of the text
• References to legislative history documents

These notes are essential when you need to determine what version of a statute was in effect at a particular time or when researching legislative intent.

Editor's Notes and Commentary

Publishers add editorial enhancements including:

• Notes explaining the purpose and effect of amendments
• Cautions about ambiguities or interpretation issues
• References to relevant legislative history
• Cross-references to related provisions

Finding Relevant Statutes

There are several approaches to finding relevant statutes. The best method depends on what you already know and the nature of your research question.

Index Approach

The index approach uses the detailed subject indexes published with annotated codes. This method works well when:

• You know the legal topic but not the specific statute
• You want to ensure comprehensive coverage of a subject area
• Full-text searching isn't returning useful results

Tips for using statutory indexes:

• Try multiple entry points—the same statute may be indexed under different terms
• Use the index's cross-references ("see also" entries)
• Note that online indexes may be less comprehensive than print versions
• Consider both specific and general terms

Popular Name Tables

Many significant statutes are known by popular names rather than their code citations. Popular name tables help you find statutes when you know the common name but not the citation.

Examples of popular names:

• ERISA (Employee Retirement Income Security Act)
• CERCLA (Comprehensive Environmental Response, Compensation, and Liability Act)
• RICO (Racketeer Influenced and Corrupt Organizations Act)
• ADA (Americans with Disabilities Act)

Both Westlaw and Lexis maintain popular name tables. These tables cross-reference the popular name to the public law number and code citations.

Full-Text Searching

Full-text searching allows you to search the text of statutes directly. This method is powerful but requires care:

Advantages:

• Fast and intuitive
• Can find statutes using any words that appear in the text
• Useful when you have specific statutory language in mind

Limitations:

• May miss relevant statutes that use different terminology
• Can return too many irrelevant results
• Doesn't reveal the statutory structure or related provisions

Secondary Sources

Often the easiest way to find relevant statutes is through secondary sources. Treatises, practice guides, and legal encyclopedias typically cite the key statutes governing their subject areas. Starting with a secondary source gives you both the statutory citations and context for understanding them.

Table of Contents Browsing

If you know approximately where in the code to look, browsing the table of contents can be effective. This approach helps you:

• See the overall structure of a statutory scheme
• Find related provisions you might otherwise miss
• Understand how different sections work together

Reading and Interpreting Statutes

Finding a statute is only the beginning. Reading statutes carefully and understanding how courts interpret them is essential to effective statutory research.

Definitions Sections

Always check for a definitions section before reading the substantive provisions. Statutory definitions:

• Are usually found near the beginning of a chapter or act
• May give words meanings different from their ordinary usage
• Are binding—courts must apply the statutory definition
• May include terms that are explicitly excluded from the definition

Missing a definitions section can lead to fundamental misunderstanding of a statute's scope and application.

Effective Dates

Effective dates determine when a statute takes effect and which version applies to your situation:

• Check whether the current version was in effect at the time of the relevant events
• Some statutes apply retroactively; others do not
• Effective date provisions are often in the session law, not the codified version
• Transitional provisions may create special rules for pending matters

Statutory Cross-References

Statutes frequently incorporate other provisions by reference. When you see a cross-reference:

• Read the referenced provision—it may modify or limit the section you're reading
• Check whether the reference is to a specific version or to the provision "as amended"
• Follow chains of references; one provision may reference another that references a third
• Be aware that cross-references can become outdated if the referenced provision is amended or repealed

Canons of Construction

Courts apply canons of construction when interpreting ambiguous statutes. Understanding these principles helps you predict how courts will interpret statutory language:

• Plain meaning — Words are given their ordinary meaning unless defined otherwise
• Ejusdem generis — General terms following specific terms are limited to things similar to the specific terms
• Expressio unius — Expression of one thing implies exclusion of others
• In pari materia — Statutes on the same subject should be read together
• Avoid surplusage — Every word should be given meaning; no words are superfluous
• Rule of lenity — Ambiguous criminal statutes are construed in favor of the defendant

Legislative History

Legislative history consists of the documents created during the legislative process. It can help interpret ambiguous statutory language—though courts and scholars disagree about its proper role.

When Legislative History Matters

Consider researching legislative history when:

• The statutory text is ambiguous
• Courts have not yet interpreted the provision
• You need to understand the purpose behind a statute
• The statute has been recently enacted or amended
• Textualist arguments are insufficient for your analysis

Types of Legislative History Documents

Different documents carry different weight with courts:

• Committee reports — Generally considered most authoritative; explain the purpose and intended effect of legislation
• Conference committee reports — Explain compromises between House and Senate versions
• Floor debates — Less authoritative; represent individual members' views, not the legislature as a whole
• Hearing testimony — Useful for understanding the problem the statute addresses, but not for interpreting specific provisions
• Presidential signing statements — Controversial; some courts consider them, others reject them

Finding Legislative History

For federal statutes:

• Congress.gov — Free access to bills, reports, and Congressional Record from 1995 forward
• Westlaw — Federal legislative history databases including compiled histories for major acts
• Lexis — Similar legislative history resources
• HeinOnline — Comprehensive historical coverage including the U.S. Congressional Serial Set
• ProQuest Congressional — Extensive legislative history database

Federal vs. State Statutory Research

While the basic principles of statutory research apply at both levels, there are important differences between federal and state statutory research.

Federal Statutory Research

The United States Code is organized into 54 titles covering different subject areas. Key resources include:

• U.S.C. (official code) — Available free on govinfo.gov and uscode.house.gov
• U.S.C.A. (West) — Annotated version on Westlaw
• U.S.C.S. (LexisNexis) — Annotated version on Lexis

Federal statutory research benefits from:

• Uniform structure across all subject areas
• Extensive annotations and editorial enhancements
• Comprehensive legislative history materials
• Multiple free and commercial access options

State Statutory Research

State statutory research presents additional challenges:

• Varying structures — Each state organizes its code differently
• Different publishers — Official and unofficial versions vary by state
• Limited legislative history — Many states have sparse legislative history records
• Currency issues — Some state codes are updated less frequently

Tips for state statutory research:

• Check your state's official legislature website for free access to current statutes
• Use state-specific secondary sources to identify key statutes
• Be aware of state-specific terminology and organizational schemes
• Verify that you're looking at the currently effective version

Uniform and Model Laws

Many state statutes are based on uniform or model laws drafted by organizations like the Uniform Law Commission or the American Law Institute:

• Uniform Commercial Code — Adopted in some form in every state
• Uniform Probate Code — Adopted in many states
• Model Penal Code — Influenced criminal codes nationwide

When researching statutes based on uniform laws, you can look to cases from other states for guidance—though be aware that states often modify uniform laws when adopting them.

Westlaw vs. Lexis for Statutory Research

Both major legal research platforms provide excellent statutory research tools, but with some differences.

Westlaw Statutory Features

• U.S.C.A. — West's annotated federal code with extensive annotations
• KeyCite — Citator service showing citing references and validity
• Notes of Decisions — Case annotations organized by topic
• Historical versions — Access to prior versions of statutes
• Context & Analysis tab — Quick access to related secondary sources
• Graphical Statute — Visual timeline showing amendments
• Key Numbers — Integration with West's digest system for finding related cases

Lexis Statutory Features

• U.S.C.S. — LexisNexis's annotated federal code
• Shepard's — Citator service for statutes
• Case Notes — Summaries of cases citing the statute
• Research References — Links to encyclopedias, treatises, and forms
• Versioning — Access to historical versions
• Practice Area filters — Narrow by legal topic
• Lexis+ AI — AI-assisted research features

Key Differences

Verification and Currency

Before relying on any statute, verify that it is current and still in effect:

• Check the currency date — Note when the database was last updated
• Use the citator — KeyCite or Shepard's will show if the statute has been amended, repealed, or held unconstitutional
• Check for pending legislation — Proposed amendments may signal upcoming changes
• Review recent session laws — For very recent changes not yet incorporated into the code

Next Steps

Now that you understand statutory research, continue building your skills:

• Regulations — Learn to research administrative rules that implement statutes
• Citators — Master KeyCite and Shepard's for verifying statutes
• Case Law Research — Find cases interpreting statutes
• Secondary Sources — Use treatises and practice guides for statutory context