The details of Ricardo EMLEG

EMLEG (Emissions Legislation) is a comprehensive summary of worldwide exhaust emissions regulations provided by Ricardo. 
The database covers not only exhaust emissions and fuel economy regulations on passenger cars and light duty trucks, but also widely regulations on heavy-duty vehicles, motorcycles and agricultural / constructing equipments, as well as standards and regulations on fuel quality and air environment. In addition, comments and explanations by Ricardo specialists are offered.

Emissions & CO2

Worldwide gas emissions and fuel consumption regulations (provided by: Ricardo Emleg)

WLTP (Worldwide Harmonized Light vehicles Test Procedures) 
Worldwide Emission & Fuel Economy/CO2 Regulation Timeline (Passenger Cars & Light Duty Trucks)
Emission Standards Europe EU EU Countries Passenger Cars & Light Duty Trucks 
France Passenger Cars & Light Duty Trucks 
Non-EU Switzerland Passenger Cars & Light Duty Trucks 
Norway Passenger Cars & Light Duty Trucks 
Turkey General 
Americas North America USA Passenger Cars & Light Duty Trucks (Federal) 
Passenger Cars & Light Duty Trucks (California State) 
Air Quality (California State) 
Canada Passenger Cars & Light Duty Trucks 
South America Mexico Passenger Cars & Light Duty Trucks
Brazil Passenger Cars & Light Duty Trucks 
Asia East Asia China Passenger Cars & Light Duty Trucks 
Heavy Duty Vehicles
Korea Passenger Cars & Light Duty Trucks
South East Asia Thailand Passenger Cars & Light Duty Trucks 
Indonesia General 
South Asia India Passenger Cars & Light Duty Trucks 
UN regulations Table of amended regulations  by JASIC 
Fuel Economy/ CO2 Europe EU EU General 
France General
Non-EU Switzerland General
Norway General
Americas North America USA
(CAFE, etc)
Federal Update
California State
Canada General
Asia East Asia China General Update
South East Asia Thailand General
South Asia India General 
UN regulations Table of amended regulations by JASIC
Noise UN regulations Table of amended regulations by JASIC
Supplemental Information Test cycles
EU Vehicle Categories

Latest Update

Date Regulation Region Updated Summaries
05 May 2018 Fuel Economy/ CO2 China 1) Phase 3 standards were published in February 2018 as GB 30510-2018, this standard will apply from 1 July 2019. Details of the Phase 3 standards will be included in the near future.
2) As for fuel consumption tests for variants of heavy duty vehicles, either the chassis dynamometer test or the simulation method can be used, at the choice of the manufacturer.
09 April 2018 Fuel Economy/ CO2 USA 1) On 2 April 2018, the EPA issued the mid-term evaluation final determination which  concluded that the GHG (greenhouse gas) standards for model years 2022-2025 contained in the original regulation are not appropriate.
2)Therefor the EPA, together with the NHTSA will initiate the process for a new proposed regulation containing updated standards for model years 2022-2025.
27 March 2018 Emission Standards Korea 1) Phase-in limits of fleet average NMOG and NOx emissions for gasoline vehicles was updated.
2) Emission durability requirements for gasoline and diesel vehicles were updated.
3) For diesel vehicles the introduction schedule of RDE testing and the relevant emissions limits was finalized.
25 January 2018 Fuel Economy/ CO2 USA On 16 November 2017, the EPA published a proposed regulation aimed at repealing the Phase 2 standards for glider engines and vehicles.
19 December 2017 Fuel Economy/ CO2 EU The information about proposed CO2 emission targets for LCV after 2020 was updated.
11 December 2017 Supplemental Information EU 1) The definition of categories for motor vehicles and trailers were updated according to EU regulation 2017/1347 [1], published on 13 July 2017.
2) The category for motorcycles and other L-category vehicles are covered in EU regulation 168/2013 [4].
27 November 2017 Fuel Economy/ CO2 EU 1) A proposed regulation, dated 8 November 2017 [23], sets the M0 value for the year 2020 to 1,379.88 kg and also sets post-2020 CO2 targets for LDV and LCV based on the WLTP test cycles.
2) The WLTP test cycles are gradually being introduced for EU type approval starting from September 2017.
09 November 2017 Emission Standards EU Corrigendum to Commission Regulation (EU) 2017/1154 was published on 4 October 2017.
31 October 2017 WLTP World Amendment 1 [8] and 2 [9] were incorporated into existing GTR 15 and published on 8 March 2017and on 24 August 2017 respectively. The test procedure and cycles for HEV and PEV were specified.
10 October 2017 Emission Standards Brazil

The information on the proposed emission control programme PROCONVE L 7 and L8 is updated. Both programmes are due to be introduced in 2022 and 2027 respectively.

25 September 2017 Emission Standards Indonesia

In March 2017, the regulation to introduce Euro 4 standards for light duty vehicles and Euro IV for heavy duty vehicles was signed.

These new standards are likely to match with the introduction of Euro 4/IV fuel, which is October 2018 for gasoline and March 2021 for diesel.
08 September 2017 Emission Standards EU 1) Real driving emissions (RDE) standards have been developed and are being implemented from 1 September 2017.
2) The introduction schedule for the Euro 6 stages is revised by regulation 2017/1347.
3) An amended Type 4 test will apply from 1 September 2019 to all new registered vehicles according to regulation 2017/1221.
21 August 2017 Fuel Economy/ CO2 USA (California State) 1. The Phase 2 standards for MY 2022 to 2025 light duty vehicles are still under re-consideration by the EPA at a federal level.
2. The California ARB jointly developed the Phase 2 heavy duty standards with EPA and plans to present a draft California Phase 2 programme in early 2018.
16 August 2017 Fuel Economy/ CO2 EU A proposed regulation for the monitoring and reporting of HDV CO2 emissions and fuel consumption was published in May 2017. The monitoring is set to start on 1 January 2019.
12 July 2017 Fuel Economy/ CO2 Canada A proposal for introducing Phase 2 standards from 2018, in line with the equivalent US standards, was published in March 2017.
23 June 2017 Fuel Economy/ CO2 India Fuel economy regulations for passenger vehicles are in place and are effective from 1 April 2017.
12 June 2017 Emission Standards Korea 1) Current emission standards are based on the CARB LEV III standards for light duty gasoline vehicles and on Euro 6 standards for light duty diesel vehicles.
2) The information about OBD thresholds for diesel vehicles applicable from 2015 was added.