Code of Federal Regulations
Electronic Code of Federal Regulations (eCFR) — Codified federal agency rules and administrative regulations.
- Title 1 General Provisions
- Title 2 Federal Financial Assistance
- 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
- 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
- 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
- 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
Source: National Archives and Records Administration (NARA) / GPO eCFR API (2026-08-27).