Bluebook Statute Citation: Rules and Format Guide

In legal scholarship and academic writing, a Bluebook statute citation is a standardized reference that directs readers to an official or commercially compiled legislative enactment. Governed primarily by Rule 12 of The Bluebook: A Uniform System of Citation, statutory citations establish an unambiguous, medium-neutral framework for referencing codified federal statutes, state statutory compilations, and historical session laws. In modern legal studies and policy research, mastering statutory citation ensures legislative traceability, confirms statutory currency, and coordinates legislative sources with administrative authorities such as federal regulations.

The format

Under Bluebook conventions, the required components of a statutory citation depend on whether the provision is codified, enacted as an uncodified session law, or derived from a specialized code:

1. Federal Codified Statutes (Rule 12.1 and Rule 12.2)

The standard citation to a federal statute currently in force in the United States Code (U.S.C.) consists of three core elements, followed by a conditional date parenthetical:

Title Number: The numerical title of the code (for example, 42).
Code Abbreviation: The standard abbreviation for the code. Use U.S.C. for the official government codification, U.S.C.A. for West’s United States Code Annotated, and U.S.C.S. for LexisNexis’s United States Code Service.
Section Symbol and Number: The section sign (§) followed by a mandatory space and the section number, including all parenthetical subdivisions (such as subsections, paragraphs, subparagraphs, and clauses) without internal spaces (e.g., § 405(c)(2)(C)(ii)).
Year Parenthetical: When citing the print version of the official United States Code, include the year of the official code edition (published every six years, e.g., 2018) or the relevant supplement. When citing commercial electronic databases (such as Westlaw or Lexis), include the name of the database provider and the currency date indicated in the service (e.g., (Westlaw current through Pub. L. No. 118-200)). Under Peter W. Martin’s Basic Legal Citation guidelines, when citing a currently effective provision that has not undergone recent revision, the date parenthetical may be omitted unless historical precision is required.
Template: [Title] U.S.C. § [Section Number] ([Year]).

2. State Codified Statutes

Unlike federal citations, which begin with a numerical title, most state statutory citations lead off with the abbreviated name of the state code, followed by the section number and a parenthetical identifying the publisher and year:

Template: [Abbreviated State Code] § [Section Number] ([Publisher] [Year]).
Subject-Matter Codes (e.g., California, New York, Texas): In states that organize statutes into named topical codes rather than numbered titles, include the subject abbreviation (e.g., Cal. Prob. Code § 141 for the California Probate Code).
Numbered State Codes: In states with unified statutory compilations, cite the compilation title and section directly (e.g., Iowa Code § 602.1614).

3. Session Laws (Rule 12.4)

Session laws represent the chronological compilation of acts passed during a legislative session. Writers must cite session laws instead of codified statutes in five specific situations: (1) newly enacted legislation not yet codified; (2) acts not codified because they lack general applicability; (3) historical provisions that have been repealed or amended; (4) statutes whose provisions are scattered across numerous titles; and (5) rare instances where the codified text differs substantively from the enacted law.

Federal Session Law Template: [Act Name], Pub. L. No. [Congress-Number], § [Section Number], [Volume] Stat. [Page] ([Year]).
In this string, Pub. L. No. identifies the Public Law number, and Stat. designates the United States Statutes at Large.

4. Named Acts (Rule 12.3.1)

When an act is widely known by a popular name, writers may provide the popular name and the original section number of the enactment alongside the codified U.S.C. reference:

Template: [Act Name] § [Original Section], [Title] U.S.C. § [Codified Section].

5. Internal Revenue Code Exception (Rule 12.9.1)

The Bluebook permits citations to federal tax statutes to substitute the abbreviation I.R.C. for 26 U.S.C.:

Template: I.R.C. § [Section Number].

For subsequent references after the initial full citation, consult the companion guide on Bluebook short form citation.

Examples

The following examples demonstrate the proper citation of federal statutes, commercial codes, state statutes, and session laws:

Example 1: Official Federal Codified Statute

Citation: 42 U.S.C. § 405(c)(2)(C)(ii).
Breakdown: Title 42 of the United States Code, section 405, subsection (c), paragraph (2), subparagraph (C), clause (ii).

Example 2: Unofficial Commercial Federal Code (West)

Citation: 42 U.S.C.A. § 1983 (West 2020).
Breakdown: West’s United States Code Annotated, section 1983, citing the 2020 bound volume.

Example 3: Federal Session Law (Statutes at Large)

Citation: Patient Protection and Affordable Care Act, Pub. L. No. 111-148, § 1001, 124 Stat. 119, 130 (2010).
Breakdown: Popular act name, Public Law number from the 111th Congress, section 1001, volume 124 of the Statutes at Large, beginning on page 119 with the pinpoint reference to page 130, enacted in 2010.

Example 4: State Subject-Matter Code

Citation: Cal. Civ. Code § 1798.100 (West Supp. 2021).
Breakdown: California Civil Code, section 1798.100, published by West in the 2021 supplement.

Example 5: Named Act Combined with Codification

Citation: Americans with Disabilities Act of 1990 § 102, 42 U.S.C. § 12112.
Breakdown: Popular act title and enacted section number, followed by the parallel codified placement in Title 42 of the U.S. Code.

Example 6: Fictitious Act for Manuscript Drafting

Citation: National Scientific Integrity Act of 2024, Pub. L. No. 118-999, § 4, 138 Stat. 4500 (2024) [fictitious example for illustration].
Breakdown: Demonstrates proper structural formatting for an enacted federal research oversight bill.

In-text citation version

In legal treatises, dissertations, and law review articles, statutory citations are formatted as footnotes rather than placed directly within parentheticals in the main body text:

Citation Sentence: A standalone footnote citation supporting an assertive sentence. For example: 18. 42 U.S.C. § 1983.
Citation Clause: A footnote citation embedded within a sentence, set off by commas, supporting a specific phrase. For example: 19. Although federal authority over water quality derives from the Clean Water Act, 33 U.S.C. § 1311, state agencies retain primary permitting authority.
Textual Sentence References: When a statute is discussed directly in the text of a manuscript, write out the word “section” or “sections” in lowercase roman type (for example, “Under section 1983 of Title 42, plaintiffs may seek injunctive relief…”). Never use the section symbol (§) in narrative sentences unless it appears inside a citation clause or parenthetical.
Footnote Reference Rules: When cross-referencing previously cited statutory provisions, remember that Bluebook Rule 4.2 strictly prohibits using supra for statutes. Writers must use Id. or a designated short form. For comprehensive guidance on cross-referencing mechanics, see how to use supra in footnotes.

Common errors

Authors and researchers frequently commit typographical and structural errors when citing statutory materials. Key errors to avoid include:

Omitting the Space After the Section Symbol: Writing §1983 is an error; Bluebook rules mandate a space between the section symbol and the number: § 1983.
Using Multiple Section Symbols Incorrectly: Use a single symbol (§) when citing one section or its internal subsections (e.g., § 405(c)). Use the double symbol (§§) only when citing two or more distinct sections (e.g., §§ 1983–1985).
Using Supra for Statutory Citations: Rule 4.2 strictly prohibits the use of supra to reference statutes, constitutions, or administrative regulations. Subsequent references must rely on Id., the code and section number, or the section symbol alone.
Unnecessary Session Law Citations: Citing the session laws (Statutes at Large) for statutes that have already been integrated into the United States Code violates Rule 12.2. Writers must cite the codified version unless an exception applies.
Formatting State Codes like Federal Statutes: Placing a title number before the state code name (e.g., 8 Del. Code Ann. instead of Del. Code Ann. tit. 8,) introduces jurisdictional errors. Writers must consult Table T1 of The Bluebook for the exact abbreviation format of each state compilation.
Omitting Publisher Identifiers in Unofficial Codes: When citing commercial compilations such as U.S.C.A. or U.S.C.S., writers must identify the commercial brand (West or LexisNexis) in the closing parenthetical.

Style-guide edition

The rules, templates, and conventions presented in this guide adhere to The Bluebook: A Uniform System of Citation, 21st edition (2020), published by the Harvard Law Review Association in association with the Columbia Law Review, the University of Pennsylvania Law Review, and the Yale Law Journal. These standards correspond with Peter W. Martin’s Basic Legal Citation (§ 2-300 to § 2-340) maintained by the Legal Information Institute (LII) at Cornell Law School.

Maintaining rigor in legal citation supports scholarly communication, adheres to law review authorship norms, and reinforces compliance across research integrity initiatives, including international data frameworks such as GDPR data protection compliance in research.

FAQ

How do you cite a federal statute in Bluebook format?
A codified federal statute is cited with the title number, the abbreviation U.S.C., a section symbol (§) followed by a space and the section number, and an optional date parenthetical (for example, 42 U.S.C. § 1983).

What is the difference between U.S.C., U.S.C.A., and U.S.C.S.?
U.S.C. refers to the official United States Code published by the federal government. U.S.C.A. (West) and U.S.C.S. (LexisNexis) are commercially published, annotated versions that include editorial summaries of judicial opinions. When citing commercial versions, you must name the publisher in the date parenthetical.

How do you cite multiple sections in Bluebook?
When citing two or more distinct sections, use double section symbols (§§) separated by a space, followed by the section range (for example, 42 U.S.C. §§ 1981–1983). When citing multiple subsections within a single section, use a single section symbol (for example, 42 U.S.C. § 405(a)–(b)).

When should you cite a session law instead of the U.S. Code?
Under Rule 12.4, you should cite a session law (e.g., Statutes at Large) only when the statute has not yet been codified, is an uncodified private or temporary enactment, has been repealed, is scattered across multiple code titles, or when you are specifically discussing the historic act as passed.

Can you use “Id.” to cite a statute?
Yes. Under Rule 4.1, you may use Id. to cite a statute if it is the immediately preceding cited authority and that prior footnote contains only one citation. If citing a different section of the same statute, write Id. § [section number] without the preposition “at”.

Sources

Martin, Peter W. Basic Legal Citation (§ 2-300: Constitutions, Statutes, and Similar Materials; § 2-320: Statute Citations—Most Common Form; § 2-330: Statute Citations—Conditional Items; § 2-340: Statute Citations—Variants and Special Cases; § 6-530: Short Form Citations—Constitutions and Statutes). Legal Information Institute (LII), Cornell Law School, 2020 ed. https://www.law.cornell.edu/citation/pages/2-300.html (read 2026-11-07).
The Bluebook: A Uniform System of Citation (21st ed. 2020). Compiled by Columbia Law Review, Harvard Law Review, University of Pennsylvania Law Review, and Yale Law Journal. Rule 12 (Statutes), Rule 12.1 (Basic Forms), Rule 12.2 (Official vs. Unofficial Codes), Rule 12.4 (Session Laws), Rule 12.10 (Short Forms), Table T1 (United States Jurisdictions). https://www.legalbluebook.com (read 2026-11-07).
Legal Information Institute (LII), Cornell Law School. Basic Legal Citation Table of Contents (§ 2-300 Statutes). https://www.law.cornell.edu/citation/pages/toc.html (read 2026-11-07).