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.

环保法规 (仅供英语)

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 Update
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 Update
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
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 Updated

Date Regulation Region Updated Summaries
22 March 2022 Emission Standards Korea Time limit to be placed in the market, for existing vehicles (gasoline and gas-engined) certified to the earlier standards, is specified.
14 March 2022 Emission Standards EU In January 2022, EU Court of Justice issued its judgement on the provisions whch introduces NOX CF to RDE test results.
3 March 2022 Fuel Economy/CO2 USA (Federal) The GHG emission standards, finalised in December 2012, added. SEFA rule repealed. California continues its own policy.
11 January 2022 Emission Standards USA (Federal) In-use verification testing is added to Tier 3 OBD.
15 November 2021 Fuel Economy/CO2 USA (Federal) The amendments for MY 2023 – 2026, proposed in August 2021, are added.
29 October 2021 Fuel Economy/CO2 USA (Federal) 1. Information on future standards added.
2. Minor changes about detailed aspects and accuracy improvement of tests.
3. CO2 standard for tractor and vocational engines mitigate for MY 2024~2026.
28 September 2021 Fuel Economy/CO2 EU Minor changes with regard to special purpose vehicles (vocational vehicles) are added.
15 September 2021 Emission Standards Brazil The due date for PROCONVE L8 is added. Details of Evaporative and re-fuelling emissions testing are added. Details of RDE tests are added.
15 June 2021 Fuel Economy/CO2 China In Phase 5, vehicle-type-individual limit values (FCL) are added.
15 June 2021 Fuel Economy/CO2 EU Future changes about determination of Post-2025 target setting for passcars and LCVs are added.
2 June 2021 Fuel Economy/CO2 India Fuel economy stantadrds for medium duty vehicles are added. The development status of simulation tool and correction factors is added, for heavy duty vehicles.
25 May 2021 Fuel Economy/CO2 USA (Federal) 1 EPA published a Notice of Reconsideration in relation to CAA Wavier which were finalized in September 2019, and also plans to issue a separate new proposal for SAFE-2 rule.
2 EPA published a rule on alternative GHG standards for small volume manufacturers, and issued weighting factor for the standard for FFV.
24 May 2021 Fuel Economy/CO2 USA (California State) EPA published a Notice of Reconsideration in relation to CAA Wavier which were finalized in September 2019, and seeking comments on the topics.
27 April 2021 WLTP Worldwide The GTR 15 (WLTP) reflecting amendment 6 [17] [18] was globally registered on 18 January 2021.
26 April 2021 Fuel Economy/CO2 EU Monitoring, collection and reporting requirements of real-world fuel and/or energy consumption for passenger cars and LCVs are added.