Free · ACS Style Guide 2026
Cite a Regulation in ACS Style
Enter the regulation title and C.F.R. reference.
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ACS Regulation Format
Hazardous Waste Management, 40 C.F.R. § 261.10 (2024).
About This Source Type
Federal regulations in the United States are published in the Code of Federal Regulations (C.F.R.). ACS citations for regulations include the regulation title, the C.F.R. title number, the part or section number, and the year.
Key Formatting Tips
- 1Use the C.F.R. (Code of Federal Regulations) for U.S. regulations
- 2Format: Title C.F.R. § Part (Year)
- 3Year refers to the year of the edition, not the promulgation date
- 4For proposed rules, cite the Federal Register (Fed. Reg.) instead