| UN R15 Emission of Gaseous Pollutants | Emission of Gaseous Pollutants (Obsolete) | Obsolete: See UNECE Regulation 84. This rule has been superseded by UN Regulation 84 and is noted solely for reference. Emission of Gaseous Pollutants Emission of Gaseous Pollutants (Obsolete) UN Regulation No. 15 UN R15 | UNR | 15 | |
| UN R24 Diesel Engine Emissions | C.I. Engine Emissions and Net Power | Uniform Provisions Concerning: I. The Approval of Compression Ignition (C.I.) Engines with regard to the Emission of Visible Pollutants; II. The Approval of Motor Vehicles with regard to the Installation of C.I. Engines of an Approved Type; III. The Approval of Motor Vehicles Equipped with C.I. Engines with regard to the Emission of Visible Pollutantns by the Engine; IV. The Measurement of Power of C.I. Engine Diesel Engine Emissions C.I. Engine Emissions and Net Power UN Regulation No. 24 UN R24 | UNR | 24 | |
| UN R40 Motorcycle Emissions | Emission of Gaseous Pollutants by Motorcycles | Uniform Provisions Concerning the Approval of Motor Cycles Equipped with a Positive-Ignition Engine with regard to the Emission of Gaseous Pollutants by the Engine Motorcycle Emissions Emission of Gaseous Pollutants by Motorcycles UN Regulation No. 40 UN R40 | UNR | 40 | |
| UN R47 Moped Emissions | Moped Emissions | Uniform Provisions Concerning the Approval of Mopeds Equipped with a Positive-Ignition Engine with regard to the Emission of Gaseous Pollutants by the Engine Moped Emissions Moped Emissions UN Regulation No. 47 UN R47 | UNR | 47 | |
| UN R49 Diesel/CNG/LNG Engine Emissions | Diesel and CNG/LNG Engine Emissions | Uniform provisions concerning the measures to be taken against the emission of gaseous and particulate pollutants from compression-ignition engines and positive ignition engines for use in vehicles Diesel/CNG/LNG Engine Emissions Diesel and CNG/LNG Engine Emissions UN Regulation No. 49 UN R49 | UNR | 49 | |
| UN R68 Maximum Speed Measurement | Measurement of Maximum Vehicle Speed | Uniform Provisions Concerning the Approval of Power-driven Vehicles Including Pure Electric Vehicles with regard to the Measurement of the Maximum Speed Maximum Speed Measurement Measurement of Maximum Vehicle Speed UN Regulation No. 68 UN R68 | UNR | 68 | |
| UN R83 Motor Vehicle Emissions | Motor Vehicle Emissions | Uniform Provisions Concerning the Approval of Vehicles with regard to the Emission of Pollutants According to Engine Fuel Requirements Together with R49, Regulation 83 addresses vehicle emissions. R83 covers emissions from all light vehicles (M1/N1) regardless of engine type and from heavier vehicles only if equipped with a gasoline engine. Under certain circumstances, R83 or R49 can apply to light vehicle CNG/LPG engines as well as to medium passenger and commercial vehicles (M2/N2) equipped with diesel engines. R83 also contains provisions specific to hybrid variations of the vehicles under its purview. Motor Vehicle Emissions Motor Vehicle Emissions UN Regulation No. 83 UN R83 | UNR | 83 | |
| UN R84 Fuel Consumption Measurement | Measurement of Passenger Car Fuel Consumption | Uniform provisions concerning the approval of vehicles with regard to the emission of pollutants according to engine fuel requirements Fuel Consumption Measurement Measurement of Passenger Car Fuel Consumption UN Regulation No. 84 UN R84 | UNR | 84 | |
| UN R85 Net Power Measurement | Power Measurement of Internal Combustion Engines and Electric Motors | Uniform Provisions Concerning the Approval of Internal Combustion Engines or Electric Drive Trains Intended for the Propulsion of Motor Vehicles of Categories M and N with regard to the Measurement of the Net Power and the Maximum 30 Minutes Power of Electric Drive Trains Net Power Measurement Power Measurement of Internal Combustion Engines and Electric Motors UN Regulation No. 85 UN R85 | UNR | 85 | |
| UN R96 NRMM Emissions | Tractor and NRMM Engine Emissions | Uniform Provisions Concerning the Approval of Compression-Ignition (C.I.) Engines to be Installed in Agricultural and Forestry Tractors and in Non-Road Mobile Machinery with regard to the Emissions of Pollutants by the Engine NRMM Emissions Tractor and NRMM Engine Emissions UN Regulation No. 96 UN R96 | UNR | 96 | |
| UN R101 CO2 Emissions/Fuel Consumption | Carbon Dioxide Emissions and Fuel/Energy Consumption | Uniform Provisions Concerning the Approval of Passenger Cars Powered by an Internal Combustion Engine Only, or Powered by a Hybrid Electric Power Train with Regard to the Measurement of the Emission of Carbon Dioxide and Fuel Consumption and/or the Measurement of Electric Energy Consumption and Electric Range, and of Categories M1 and N1 Vehicles Powered by an Electric Power Train Only with Regard to the Measurement of Electric Energy Consumption and Electric Range CO2 Emissions/Fuel Consumption Carbon Dioxide Emissions and Fuel/Energy Consumption UN Regulation No. 101 UN R101 | UNR | 101 | |
| UN R103 Replacement Catalytic Converters | Replacement Catalytic Converters | Uniform Provisions Concerning the Approval of Replacement Catalytic Converters for Power-driven Vehicles Replacement Catalytic Converters Replacement Catalytic Converters UN Regulation No. 103 UN R103 | UNR | 103 | |
| UN R120 NRMM Net Power/Fuel Consumption | Measurement of Net Power and Fuel Consumption of Tractors and Non-Road Mobile Machinery | Uniform Provisions Concerning the Approval of Internal Combustion Engines to be Installed in Agricultural and Forestry Tractors and in Non-Road Mobile Machinery, with regard to the Measurement of the Net Power, Net Torque, and Specific Fuel Consumption NRMM Net Power/Fuel Consumption Measurement of Net Power and Fuel Consumption of Tractors and Non-Road Mobile Machinery UN Regulation No. 120 UN R120 | UNR | 120 | |
| UN R132 Retrofit Emissions | Retrofit Emission Control Devices | Uniform provisions concerning the approval of Retrofit Emission Control devices (REC) for heavy duty vehicles, agricultural and forestry tractors and non-road mobile machinery equipped with compression ignition engines WP.29 adopted the first phase text of the REC regulation at its November 2013 session. A second phase text is under consideration. Retrofit Emissions Retrofit Emission Control Devices UN Regulation No. 132 UN R132 | UNR | 132 | |
| UN R133 Vehicle Recyclability | Light Vehicle Recyclability | Uniform provisions concerning the approval of motor vehicles with regard to their reusability, recyclability and recoverability Beginning in the 1990's, a number of nations began introducing legislation to regulate the treatment of end-of-life vehicles. These efforts have resulted in regulations and proposals stipulating that vehicles must be "re-usable, recyclable, and/or recoverable" to high degrees. In order to promote uniform regulations related to such vehicle design issues, the World Forum accepted a proposal by the International Association of Motor Vehicle Manufacturers (OICA) to establish a new UN Regulation concerning the recyclability of M1 and N1 vehicles. UN Regulation No. 133 was adopted by the World Forum in June 2013 and entered into force a year later. Vehicle Recyclability Light Vehicle Recyclability UN Regulation No. 133 UN R133 | UNR | 133 | |
| UN R143 HD Dual Fuel Retrofit Systems | Heavy-Duty Dual Fuel Retrofit Systems | Uniform provisions concerning the approval of Heavy Duty Dual-Fuel Engine Retrofit Systems (HDDF-ERS) to be installed on heavy duty diesel engines and vehicles HD Dual Fuel Retrofit Systems Heavy-Duty Dual Fuel Retrofit Systems UN Regulation No. 143 UN R143 | UNR | 143 | |
| UN R154 WLTP Type Approval | Light Vehicle Emissions Type Approval Test Procedure | WLTP Type Approval Light Vehicle Emissions Type Approval Test Procedure UN Regulation No. 154 UN R154 | UNR | 154 | |
| UN R168 RDE | Real Driving Emissions Test Procedure | RDE Real Driving Emissions Test Procedure UN Regulation No. 168 UN R168 | UNR | 168 | |
| UN R177 EV power determination | Electrified vehicle power determination | UN Regulation on the determination of system power of hybrid electric vehicles and of pure electric vehicles having more than one electric machine for propulsion EV power determination Electrified vehicle power determination UN Regulation No. 177 UN R177 | UNR | 177 |