CFR
- Title 1 - General Provisions
- Title 2 - Grants and Agreements
- 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 - Panama Canal
- 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
91.4—Acronyms and abbreviations.
The following acronyms and abbreviations apply to this part 91.
AECD—Auxiliary emission control device
ASME—American Society of Mechanical Engineers
ASTM—American Society for Testing and Materials
CAA—Clean Air Act
CAAA—Clean Air Act Amendments of 1990
CLD—chemiluminescent detector
CO—Carbon monoxide
CO2—Carbon dioxide
EPA—Environmental Protection Agency
FEL—Family Emission Limit
g/kw-hr—grams per kilowatt hour
HC—hydrocarbons
HCLD—heated chemiluminescent detector
HFID—heated flame ionization detector
ICI—Independent Commercial Importer
MY—Model Year
NDIR—non-dispersive infrared analyzer
NIST—National Institute for Standards and Testing
NO—Nitric oxide
NO2—Nitrogen dioxide
NOX—Oxides of nitrogen
OB—Outboard engine
O2—Oxygen
OEM—Original engine manufacturer
PMD—paramagnetic detector
PWC—personal watercraft
RPM—revolutions per minute
SAE—Society of Automotive Engineers
SEA—Selective Enforcement Auditing
SI—Spark-ignition
U.S.C.—United States Code
VOC—Volatile organic compounds
ZROD—zirconium dioxide sensor
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