Understanding the Code of Federal Regulations (CFR)

What is the Code of Federal Regulations?

The Code of Federal Regulations, commonly abbreviated as CFR, is the official compilation of the general and permanent rules published in the Federal Register by the executive departments and agencies of the United States Federal Government. While statutes (laws passed by Congress) are contained in the United States Code (U.S.C.), the CFR contains the detailed regulations that agencies issue to implement and enforce those statutes.

Every regulation in the CFR has the force of law, provided that it is within the agencys statutory authority and complies with constitutional requirements. Violations can lead to civil or criminal penalties, depending on the agency and the specific rule.

Structure & Organization

The CFR is divided into 50 titles, each covering a broad area of federal regulation. Titles are further broken down as follows:

• Parts Major categories within a title (e.g., Part 210 General Requirements for Certain Financial Institutions).
• Subparts Optional subdivisions that group related sections.
• Sections Individual rules, numbered using a decimal system (e.g., 21CFR1301.01).
• Paragraphs Additional hierarchical levels identified by letters, numbers, or Roman numerals.

For example, Title21 governs Food and Drugs, and within that title, Part110 outlines current Good Manufacturing Practice (cGMP) regulations for pharmaceuticals.

How the CFR Is Updated

Regulations are first published in the Federal Register, a daily journal of the U.S. government. After a rule is finalized, it is incorporated into the CFR during the annual updating cycle:

1. JanuaryApril: Titles116 are updated.
2. MayAugust: Titles1727 are updated.
3. SeptemberDecember: Titles2850 are updated.

Because this cycle can leave a sixmonth lag between a rules appearance in the Federal Register and its placement in the CFR, many practitioners also consult the Federal Register website for the most current language.

Research Tips for Using the CFR

1. Start with the Table of Contents

The online table of contents on the eCFR (Electronic CFR) lets you quickly locate the title and part that likely contains the rule you need.

2. Use Keyword Searches

Both the eCFR and the Government Publishing Office (GPO) provide fulltext search capabilities. Include quotation marks for exact phrases (e.g., hazardous waste).

3. Check for Amendments

Regulations are frequently amended. Look at the Effective Date at the top of each part and review the Amended notes to see when changes occurred.

4. CrossReference With Statutes

When a regulation cites a statutory citation (e.g., 42U.S.C.300aa5), verify that the agency is acting within its authority. Tools such as Congress.gov can help you read the underlying law.

5. Cite Properly

A typical citation looks like: 21 C.F.R. 1301.01 (2023). Include the title, abbreviation C.F.R., section number, and year of the edition consulted.

CFR vs. Statutes: Key Differences

Understanding the relationship between statutes and regulations is essential for anyone working with federal law.

Important Online Resources

• Electronic Code of Federal Regulations (eCFR) continuously updated version of the CFR.
• Federal Register daily publication of proposed and final rules.
• GovInfo CFR Collection downloadable PDFs of each title.
• Legal Information Institute U.S. Code quick access to statutes.
• Regulations.gov submit public comments on proposed rules.