Definition	The Code of Federal Regulations (CFR) is a codification of general and permanent rules (regulations) that have been previously published in the Federal Register. The CFR, which is compiled by the Office of the Federal Register, is divided into 50 titles, which cover broad areas subject to Federal regulation.
Background	Many laws enacted by Congress require agencies to issue regulations. To fulfill this requirement, those regulations are first published in the Federal Register. Annually, regulations that have appeared in the Federal Register are compiled in the CFR. First, an agency prepares a proposed regulation (or rule), which usually contains a preamble explaining many of the decisions in the proposed regulation. Next, the proposed rule is published in the Federal Register, and public comments are received during a specified time period (usually 90 days). Comments are then considered by the agency issuing the rule, and are responded to in a separate, supporting document that is published with the final regulation. After publication in the Federal Register as a final rule, new regulations are then codified in the CFR. The 50 titles within the CFR are divided into chapters, which are then divided into parts, which are further divided into sections. The Office of the Federal Register assigns each agency a title, chapter, and part(s) in which to publish its regulation(s) in the CFR.
Title	Each title represents a broad area subject to Federal regulation, and is identified by Arabic numerals (i.e., 1, 2, etc.). Titles are sometimes subdivided into subtitles, which are numbered consecutively in English capital letters (i.e., A, B, etc.). Subtitles are sometimes used to group chapters, or to separate department-wide regulations from regulations that pertain to the department's various units.
Chapter	Titles and subtitles are divided into chapters, which are identified by Roman numerals (i.e., I, II, etc.). Each chapter is usually assigned to a single agency, and may cover the entire department or one of its units. Chapters are sometimes divided into subchapters to group related parts. Subchapters are distinguished by English capital letters (i.e., A, B, etc.).
Part	Each part is identified by a number (i.e., 1, 2, etc.), and contains a unified body of regulations pertaining to a single function of the issuing agency, or devoted to a specific subject matter under the control of the issuing agency. Parts are usually assigned to chapters (i.e., Chapter I, Parts 1 through 199, etc.). Subparts, usually numbered in English capital letters (i.e., A, B, etc.), are sometimes used to group related sections within a part.
Section	The section is the basic unit of the CFR, and ideally consists of a short, simple presentation of one topic. By convention, each section is identified by the part number (i.e., 120), followed by a period and the section number (i.e., 120). Sections of text are further divided into subsections, which are identified by lowercase English capital letters (i.e., a, b, etc.).
Example	Title 23: Highways Chapter I: Federal Highway Administration Department: Transportation Part 140: Reimbursement Section 140.908: Materials and supplies. a. Procurement. b. Costs. c. Materials recovered.
Update	Each volume of the CFR is revised at least once each calendar year, and is issued as follows: Title: Issued by: 1 through 16 January 1 7 through 27 April 1 28 through 41 July 1 42 through 50 October 1
Tip	When generating a query in the Code of Federal Regulations database, if you are trying to locate a particular passage, separate the Title and Part by a colon. Do not include the abbreviation CFR if you are searching a particular passage within the document. Cited passages in the database are arranged with a colon, not with CFR. For example, if you are trying to locate "40 CFR 265" your search string should be "40:265". Regulations and related information less than one year old may be found in the Federal Register, if it is not yet codified in the CFR. EnviroText maintains about 60% of the complete CFR, including all environmental requirements. EnviroText currently includes all CFR sections in the table below. This information will be updated as revised sections are made available from the Government Printers Office. You can also search the database with key words (i.e., "Clean Air Act" Radon). This search will retrieve sections of the Clean Air Act that contain the word "Radon." Words such as "and," "or," or "not" are not needed when wording a query because they will be removed by the search engine. The phrase, "Clean Air Act," is enclosed in quotations to retrieve only that particular Act. If the phrase was not enclosed in quotations, the query would retrieve documents that contained any combination of the words "clean," "air" or "act."

Title	Sections	Last Update to EnviroText
7 - Agriculture	400-699	01-01-94
10 - Energy	0-399 500-end	01-01-94 01-01-94
12 - Banks and Banking	300-499 600-end	01-01-94 01-01-95
14 - Aeronautics and Space	1200-end	01-01-94
15 - Commerce and Foreign Trade	0-299 800-end	01-01-94 01-01-94
16 - Commercial Practices	1000-end	01-01-94
17 - Commodity and Security Exchanges	200-239	04-01-94
18 - Conservation of Power and Water Resources	1-149 150-279 280-end	04-01-95* 04-01-94 04-01-95*
19 - Custom Duties	all	04-01-95*
21 - Food and Drugs	0-169 170-199	04-01-94 04-01-95*
22 - Foreign Relations	0-299	04-01-94
23 - Highways	all	04-01-94
24 - Housing and Urban Development	0-199	04-01-94
25 - Indians	all	04-01-94
28 - Judicial Administration	all	07-01-94
29 - Labor	all	07-01-94
30 - Mineral Resources	all	07-01-94
32 - National Defense	1-190 191-399 630-699 700-end	07-01-94 07-01-93 07-01-92 07-01-94
33 - Navigation and Navigable Waterways	200-end	07-01-94
36 - Parks, Forests, and Public Property	1-199 200-end	7-01-93 07-01-94
38 - Pensions, Bonuses, and Veterans' Relief	0-17 18-end	07-01-93 09-01-92
39 - Postal Service	all	07-01-94
40 - Protection of Environment	1-51 52-60 61-80 81-85 86-99 100-149 150-299 300-424 425-699 700-789 790-end	07-01-93 07-01-94 07-01-93 07-01-94 07-01-92 07-01-94 07-01-93 07-01-94 07-01-92 07-01-93 07-01-94
43 - Public Lands: Interior	0-999	10-01-94*
44 - Emergency Management and Assistance	all	10-01-94*
45 - Public Welfare	500-1199	10-01-94*
46 - Shipping	500-end	10-01-94*
47 - Telecommunications	0-19	10-01-94*
48 - Federal Acquisitions Regulations System (FARS)	1-99 201-299 301-670 701-1452 1501-2852 2901-9904	10-01-94 10-01-94 10-01-94 10-01-94* 10-01-94* 10-01-94