How to Read a Regulatory Citation

What a Regulatory Citation Represents

A regulatory citation functions as a standardized address system for locating specific provisions within published regulatory texts. The citation encodes information about the document’s location within a hierarchical organizational structure, identifying both the source publication and the precise textual unit being referenced. Regulatory citations follow established formatting conventions that distinguish them from statutory citations, case citations, and other legal reference systems.

The citation itself consists of numerical and textual components arranged in a specific sequence. Each component corresponds to a level within the organizational hierarchy of the regulatory compilation. The arrangement of these components creates a unique identifier that points to a single regulatory provision or a defined range of provisions within the larger regulatory corpus.

Source and Jurisdiction Identification

Regulatory citations identify the jurisdiction and source publication through their structural components. Federal regulations in the United States appear in two primary publications: the Federal Register and the Code of Federal Regulations. The citation format reveals which publication contains the referenced material.

Citations to the Code of Federal Regulations begin with a title number, which corresponds to one of fifty broad subject-matter categories into which federal regulations are organized. These title numbers range from 1 to 50, with each title covering a distinct regulatory domain. The title number appears first in the citation, followed by the abbreviation “C.F.R.” or “CFR,” which identifies the Code of Federal Regulations as the source.

Federal Register citations follow a different pattern, beginning with a volume number rather than a title number. The volume number corresponds to the calendar year of publication, as the Federal Register publishes daily and compiles annually into numbered volumes. The abbreviation “Fed. Reg.” or “F.R.” identifies the Federal Register as the source publication.

Title Numbers, Part Numbers, and Section Numbers

The Code of Federal Regulations employs a three-tier numerical system consisting of titles, parts, and sections. The title number represents the broadest organizational category. Within each title, regulations are subdivided into parts, which group related regulatory provisions addressing specific subject areas or regulatory programs. Part numbers typically consist of one to four digits and appear after the title number in a citation.

Sections represent the most granular level of organization within the Code of Federal Regulations. Each section contains a discrete regulatory provision, which may consist of a single paragraph or multiple subdivided paragraphs. Section numbers appear after the part number and are separated by a decimal point. A complete citation to a specific regulatory provision includes the title number, the section number (which incorporates the part number before the decimal), and the source abbreviation.

For example, the citation “40 C.F.R. § 261.3” identifies Title 40, Part 261, Section 3. The section number “261.3” indicates that the provision appears in Part 261 as Section 3. The digits before the decimal point correspond to the part number, while the digits after the decimal point identify the specific section within that part.

Hierarchical Structure in Citations

Regulatory citations reflect the nested organizational structure of the Code of Federal Regulations. Sections may be subdivided into paragraphs, subparagraphs, and further subdivisions, each designated by a specific labeling system. Paragraphs within a section are typically designated by lowercase letters in parentheses, such as (a), (b), or (c). Subparagraphs use Arabic numerals in parentheses, such as (1), (2), or (3).

Further subdivisions employ lowercase Roman numerals in parentheses, followed by uppercase letters in parentheses for additional levels of subdivision. This hierarchical labeling system allows citations to reference not only entire sections but also specific paragraphs or subparagraphs within those sections. A citation that includes paragraph designations, such as “40 C.F.R. § 261.3(a)(2)(i),” points to a specific subparagraph within the larger section.

Parts themselves may be organized into subparts, which group related sections within a part. Subpart designations typically use uppercase letters, such as Subpart A, Subpart B, and so forth. Citations may reference entire subparts when discussing a collection of related provisions rather than a single section.

Federal Register and Code of Federal Regulations Citation Differences

Federal Register citations differ structurally from Code of Federal Regulations citations because the Federal Register serves a different documentary function. The Federal Register publishes proposed rules, final rules, notices, and other regulatory documents in chronological order as they are issued. Federal Register citations include a volume number, a page number, and a publication date.

A Federal Register citation takes the form “volume number Fed. Reg. page number (date).” For example, “85 Fed. Reg. 12345 (Mar. 1, 2020)” refers to material appearing on page 12,345 of volume 85, published on March 1, 2020. Unlike Code of Federal Regulations citations, Federal Register citations do not inherently indicate the subject matter or regulatory location of the material.

When a final rule published in the Federal Register amends the Code of Federal Regulations, the Federal Register document typically includes information about which C.F.R. provisions are being added, revised, or removed. The Federal Register citation identifies where the regulatory action was published, while the C.F.R. citation identifies where the resulting regulatory text appears in the codified compilation.

Amendments, Revisions, and Effective Dates

Regulatory citations may include date information to specify which version of a regulation is being referenced. The Code of Federal Regulations is updated annually, with different titles updated on a quarterly schedule. Citations may include a year in parentheses following the source abbreviation to indicate which annual edition of the C.F.R. contains the referenced text.

When regulations are amended, the underlying C.F.R. citation remains the same, but the text at that citation changes. The Federal Register publishes the amending document, which specifies the effective date of the changes. A citation to regulatory text as it existed before an amendment may include a date qualifier to distinguish it from the current version.

Effective dates determine when amended regulatory text becomes operative. The Federal Register document announcing the amendment specifies the effective date, which may differ from the publication date. Citations to regulatory provisions may reference the effective date to clarify which version of the regulation applies to a particular time period.

Parallel Citations and Authority References

Regulatory text often includes authority citations that identify the statutory provisions under which the regulation was promulgated. These authority citations appear in the Code of Federal Regulations as notes following the regulatory text. The authority citation references the United States Code provisions that grant the regulatory agency the power to issue the regulation.

Parallel citations may appear when regulatory provisions are referenced in multiple contexts or when a regulation implements or interprets a specific statutory provision. The regulatory citation and the statutory citation serve different functions: the regulatory citation locates the regulatory text, while the statutory citation identifies the underlying legal authority.

Cross-references within regulatory text use citation format to direct readers to related provisions elsewhere in the Code of Federal Regulations. These internal citations follow the same structural format, allowing navigation between interconnected regulatory provisions within the same title or across different titles.