Code of Federal Regulations
The Code of Federal Regulations
Office of the Federal Register (United States)
|ISO 4||Code Fed. Regul.|
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common law jurisdictions
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civil law jurisdictions
The Code of Federal Regulations (CFR) is the codification of the general and permanent rules and regulations (sometimes called administrative law) published in the Federal Register by the executive departments and agencies of the federal government of the United States. The CFR is divided into 50 titles that represent broad areas subject to federal regulation.
The CFR annual edition is the codification of the general and permanent rules published by the Office of the Federal Register (part of the National Archives and Records Administration) and the Government Publishing Office.  In addition to this annual edition, the CFR is published in an unofficial format online on the Electronic CFR website, which is updated daily.
Under the nondelegation doctrine, federal agencies are authorized by "enabling legislation" to promulgate regulations ( rulemaking).  The process of rulemaking is governed by the Administrative Procedure Act (APA): generally, the APA requires a process that includes publication of the proposed rules in a notice of proposed rulemaking (NPRM), a period for comments and participation in the decisionmaking, and adoption and publication of the final rule, via the Federal Register.  
The rules and regulations are first promulgated or published in the Federal Register. The CFR is structured into 50 subject matter titles. Agencies are assigned chapters within these titles. The titles are broken down into chapters, parts, sections and paragraphs.  For example, 42 CFR 260.11(a)(1) would be read as "title 42, part 260, section 11, paragraph (a)(1)."
While new regulations are continually becoming effective, the printed volumes of the CFR are issued once each calendar year, on this schedule:
- Titles 1–16 are updated as of January 1
- Titles 17–27 are updated as of April 1
- Titles 28–41 are updated as of July 1
- Titles 42–50 are updated as of October 1
The Office of the Federal Register also keeps an unofficial, online version of the CFR, the e-CFR, which is normally updated within two days after changes that have been published in the Federal Register become effective.  The Parallel Table of Authorities and Rules lists rulemaking authority for regulations codified in the CFR. 
The CFR is divided into 50 titles that represent broad subject areas: 
- Title 1: General Provisions
- Title 2: Grants and Agreements
- Title 3: The President
- Title 4: Accounts
- Title 5: Administrative Personnel
- Title 6: Domestic Security
- Title 7: Agriculture
- Title 8: Aliens and Nationality
- Title 9: Animals and Animal Products
- Title 10: Energy
- Title 11: Federal Elections
- Title 12: Banks and Banking
- Title 13: Business Credit and Assistance
- Title 14: Aeronautics and Space (also known as the Federal Aviation Regulations)
- Title 15: Commerce and Foreign Trade
- Title 16: Commercial Practices
- Title 17: Commodity and Securities Exchanges
- Title 18: Conservation of Power and Water Resources
- Title 19: Customs Duties
- Title 20: Employees' Benefits
- Title 21: Food and Drugs
- Title 22: Foreign Relations
- Title 23: Highways
- Title 24: Housing and Urban Development
- Title 25: Indians
- Title 26: Internal Revenue (also known as the Treasury Regulations)
- Title 27: Alcohol, Tobacco Products and Firearms
- Title 28: Judicial Administration
- Title 29: Labor
- Title 30: Mineral Resources
- Title 31: Money and Finance: Treasury
- Title 32: National Defense
- Title 33: Navigation and Navigable Waters
- Title 34: Education
- Title 35: Reserved (formerly Panama Canal)
- Title 36: Parks, Forests, and Public Property
- Title 37: Patents, Trademarks, and Copyrights
- Title 38: Pensions, Bonuses, and Veterans' Relief
- Title 39: Postal Service
- Title 40: Protection of Environment
- Title 41: Public Contracts and Property Management
- Title 42: Public Health
- Title 43: Public Lands: Interior
- Title 44: Emergency Management and Assistance
- Title 45: Public Welfare
- Title 46: Shipping
- Title 47: Telecommunication
- Title 48: Federal Acquisition Regulations System
- Title 49: Transportation
- Title 50: Wildlife and Fisheries
The Federal Register Act originally provided for a complete compilation of all existing regulations promulgated prior to the first publication of the Federal Register, but was amended in 1937 to provide a codification of all regulations every five years.  The first edition of the CFR was published in 1938.  Beginning in 1963 for some titles and for all titles in 1967, the Office of the Federal Register began publishing yearly revisions, and beginning in 1972 published revisions in staggered quarters. 
On March 11, 2014, Rep. Darrell Issa introduced the Federal Register Modernization Act (H.R. 4195; 113th Congress), a bill that would revise requirements for the filing of documents with the Office of the Federal Register for inclusion in the Federal Register and for the publication of the Code of Federal Regulations to reflect the changed publication requirement in which they would be available online but would not be required to be printed.  The American Association of Law Libraries (AALL) strongly opposed the bill, arguing that the bill undermines citizens' right to be informed by making it more difficult for citizens to find their government's regulations.  According to AALL, a survey they conducted "revealed that members of the public, librarians, researchers, students, attorneys, and small business owners continue to rely on the print" version of the Federal Register.  AALL also argued that the lack of print versions of the Federal Register and CFR would mean the 15 percent of Americans who don't use the internet would lose their access to that material.  The House voted on July 14, 2014 to pass the bill 386–0.  
- United States Reports
- California Code of Regulations
- Florida Administrative Code
- Illinois Administrative Code
- Code of Massachusetts Regulations
- List of CFR Sections Affected
- New Hampshire Code of Administrative Rules
- New Jersey Administrative Code
- New York Codes, Rules and Regulations
- Oregon Administrative Rules
- Pennsylvania Code
- "Browse Code of Federal Regulations (Annual Edition)". FDsys. US Government Publishing Office Federal Digital System. Retrieved 2014-05-23.
- "Federal Administrative Law". Duke University School of Law. Retrieved March 10, 2014.
- 5 U.S.C. § 553
- "eCFR – Code of Federal Regulations". FDsys – US Government Publishing Office Federal Digital System. 2014-05-21. Retrieved 2014-05-23.
- "Electronic Code of Federal Regulations". Office of the Federal Register. Retrieved March 10, 2014.
- "About Code of Federal Regulations". Government Publishing Office. Retrieved March 10, 2014.
- "A Research Guide to the Federal Register and the Code of Federal Regulations". Law Librarians' Society of Washington, D.C. Retrieved March 10, 2014.
- "H.R. 4195 – Summary". United States Congress. Retrieved 14 July 2014.
- "The Federal Register and Code of Federal Regulations" (PDF). American Association of Law Libraries. Archived from the original (PDF) on 15 July 2014. Retrieved 14 July 2014.
- Medici, Andy (15 July 2014). "House passes bills to change TSP default fund, extend whistleblower protections". Federal Times. Archived from the original on 26 July 2014. Retrieved 21 July 2014.
- "H.R. 4195 – All Actions". United States Congress. Retrieved 14 July 2014.
- "About Code of Federal Regulations". Government Publishing Office.
- "A Research Guide to the Federal Register and the Code of Federal Regulations". Law Librarians' Society of Washington, D.C. July 21, 2012.
- "Report to Congress on the Costs and Benefits of Federal Regulations". Office of Management and Budget. September 30, 1997.
- "The Federal Register Tutorial / The Federal Register: What It Is and How to Use It". Office of the Federal Register. 2016-08-15.
- Electronic Code of Federal Regulations (eCFR) from the GPO
- Code of Federal Regulations (annual edition) on FDsys from the GPO
- Code of Federal Regulations in the GPO's U.S. Government Bookstore
- Code of Federal Regulations (cross-referenced to U.S. Code) from Cornell LII
- Code of Federal Regulations (cross-referenced to U.S. Code) from GovRegs
- Sources and Tools to the Code of Federal Regulations free and commercial from LLSDC.org