The Statutes at Large, however, is not a convenient tool for legal research. It is arranged strictly in chronological order, so that statutes addressing related topics may be scattered across many volumes. Statutes often repeal or amend earlier laws, and extensive cross-referencing is required to determine what laws are in effect at any given time.
The United States Code is the result of an effort to make finding relevant and effective statutes simpler by reorganizing them by subject matter, and eliminating expired and amended sections. The Code is maintained by the Office of the Law Revision Counsel (LRC) of the U.S. House of Representatives. The LRC determines which statutes in the United States Statutes at Large should be codified, and which existing statutes are affected by amendments or repeals, or have simply expired by their own terms. The LRC updates the Code accordingly.
Because of this codification approach, a single named statute (like the Taft-Hartley Act, or the Embargo Act) may or may not appear in a single place in the Code. Often, complex legislation bundles a series of provisions together as a means of addressing a social or governmental problem; those provisions often fall in different logical areas of the Code.
For example, a bill providing relief for family farms might affect items in Title 7 (Agriculture), Title 26 (Tax), and Title 43 (Public Lands). When the bill is codified, its various provisions might well be placed in different parts of those various Titles. Traces of this process are generally found in the Notes accompanying the "lead section" associated with the popular name, and in cross-reference tables that identify Code sections corresponding to particular Acts of Congress.
Usually the individual sections of a statute are incorporated into the Code exactly as enacted; however, sometimes editorial changes are made by the LRC (for instance, the phrase "the date of enactment of this Act" is replaced by the actual date). Though authorized by statute, these changes do not constitute positive law.
By law, those titles of the United States Code that have not been enacted into positive law are "prima facie evidence of the law in effect. The Statutes at Large remains the ultimate authority. If a dispute arises as to the accuracy or completeness of the codification of an unenacted title, the courts will turn to the language in the United States Statutes at Large. Where a title has been enacted into positive law, however, a court may neither permit nor require proof of the underlying original statutes. The distinction between enacted and unenacted titles is largely academic because the Code is nearly always accurate. The United States Code is routinely cited by the Supreme Court and other federal courts without mentioning this theoretical caveat. On a day-to-day basis, very few lawyers cross-reference the Code to the Statutes at Large.
The authority for the material in the United States Code comes from its enactment through the legislative process and not from its presentation in the Code. For example, the United States Code inadvertently omitted 12 U.S.C. § 92 for decades, even after Congress amended it in 1982. In its 1993 ruling in U.S. National Bank of Oregon v. Independent Insurance Agents of America, the Supreme Court ruled that section 92 was still valid law.
The LRC continues the process of revising, updating, and restating the existing body of statutory law in codified form. As the LRC completes particular areas of the law, it proposes that the Congress enact those titles of the Code as "positive law". If a particular title of the United States Code is enacted into law, the enactment repeals all previous enactments on the subject (including those found in the Statutes at Large), thereby making that title of the United States Code "legal evidence of the law in force.
Only "general and permanent" laws are codified; the Code does not usually include provisions that apply only to a limited number of people (a private law) or for a limited time, such as most appropriation acts or budget laws, which apply only for a single fiscal year. If these limited provisions are significant, however, they may be printed as "notes" underneath related sections of the Code. The codification is based on the content of the laws, however, not the vehicle by which they are adopted; so, for instance, if an appropriations act contains substantive, permanent legislation (as is sometimes the case), the permanent provisions will be incorporated into the Code even though they were adopted as part of a non-permanent enactment.
Not all titles use the same series of subdivisions above the section level, and they may arrange them in different order. For example, in Title 26 (the tax code), the order of subdivision runs:
In Title 38 (Veteran's Benefits) the order runs Title - Part - Chapter - Subchapter - Section. Put another way, the Title is always the largest division of the Code, and the section the smallest (except for subsections, paragraphs, clauses, etc.), but intermediate levels vary in both number and sequence from Title to Title.
The word "title" in this context is roughly akin to a printed "volume," although many of the larger titles span multiple volumes. Similarly, no particular size or length is associated with other subdivisions; a section might run several pages in print, or just a sentence or two. Some subdivisions within particular titles acquire meaning of their own; for example, it's common for lawyers to refer to a "Chapter 11" bankruptcy or a "Subchapter K" partnership.
According to one style manual, a sample citation would be Privacy Act of 1974, (2006). A lawyer would read that out loud as "Title five, United States Code, section five hundred fifty-two A." or simply "5 USC five hundred fifty-two A."
When sections are repealed, their text is deleted and replaced by a note summarizing what used to be there. This is necessary so that lawyers reading old cases can understand what the cases are talking about. As a result, some portions of the Code consist entirely of empty chapters full of historical notes. For example, Title 8, Chapter 7 is labeled "Exclusion of Chinese." This contains historical notes relating to the Chinese Exclusion Act, which is no longer in effect.
The official version of the Code is published by the LRC as a series of paper volumes. The first edition of the Code was contained in a single bound volume; today, it spans several large volumes. Normally, a new edition of the Code is issued every six years, with annual supplements identifying the changes made by legislation in each session of Congress.
In practice, however, the Code is kept up-to-date on a near-current basis as laws are enacted, and notes are printed in the margins of the slip laws indicating where each section will be codified, if at all. Both the LRC and the GPO offer electronic versions of the Code to the public. The electronic version may be as much as 18 months behind current legislation, but it is the most up to date official version.
The Uniform Code of Military Justice is contained in Title 10, Chapter 47. It defines infractions such as going AWOL and contains the popularly-known phrase, "Conduct unbecoming an officer and a gentleman."
Title 11 is the Bankruptcy Code. Some of the different types of bankruptcy are commonly referred to simply by their chapter numbers: Chapter 7, Chapter 11, Chapter 13.
Title 18 deals with federal crimes.
Title 26 is also known as the Internal Revenue Code. Much of Title 26 is administered and enforced by the Internal Revenue Service and is one of the largest portions of the Code.
Title 28 governs procedure in the United States federal courts.
Title 42 is a lengthy title which includes statutes governing several large federal government programs like Social Security and Medicare. One provision, , is the basis for a wide range of federal civil rights actions in federal courts; it is the codification of the Civil Rights Act of 1871. Section 1983 cases include suits alleging use of excessive force by police and First Amendment suits against public schools to maintain church/state separation. Section 1983 itself is quite short; the annotations (i.e., the digests and summaries of court decisions interpreting it), however, span several volumes.