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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 Passenger Cars & Light Duty Trucks Update
Euro 7
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 U.S. Federal Passenger Cars & Light Duty Trucks
California State Passenger Cars & Light Duty Trucks
California State Passenger Cars & Light Duty Trucks (LDV/MDV 2026MY～)
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 Update
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
California State
Canada General
Asia East Asia China 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
25 May 2023 Emission Standards EU Following the publication & implementation of regulation 2023/443, regulation 2017/1151 is amended, which influences many standards and procedures.
2 May 2023 Emission Standards Thailand The Government indicated that introduction of Euro 5 standard is postponed to January 2024.
27 March 2023 Emission Standards India The latest amendments to BS VI were published in July 2022.
Draft CF values for RDE tests were issued in February 2023.
8 March 2023 Emission Standards California State (LDV/MDV 2026MY～) Evaporative emission rquirements are added.
8 March 2023 Emission Standards California State Evaporative emissions (overview and refuelling requirements) added.
6 March 2023 Fuel Economy/CO2 USA (Federal) 1. Fuel economy target diagram for LD pascars and trucks minor changed.
2. Amendments to HD Phase 2 pollutant’s emission standards finalised in Jan.2023. GHG std.s to be fixed later in 2023.
28 February 2023 Fuel Economy/CO2 India 1. One of the b values for calculation of fuel consumption of Light duty vehicles modified.
2. The provisional draft for Medium/Heavy duty vehicles finalised in November 2022.
13 February 2023 Fuel Economy/CO2 Canada 1) Light duty vehicles : Movements for MY 2017 and after are added.
2) Heavy duty vehicles : The status of Phase 2 standards are addded.
13 January 2023 Emission Standards EU Euro 7 report was added.
8 December 2022 Fuel Economy/CO2 China For heavy duty vehicles, Phase 4 standards were proposed and test procedures were defined.
24 November 2022 Emission Standards EU As the ruling by the Court of Justice, the proposed regulation published in 2019 amending regulation 715/2007 is withdrawn.
28 October 2022 Emission Standards California State Finalized drafts for the new emissions standards and associated requirements were published in August 2022 by California's Air Resources Board (CARB).
20 October 2022 Emission Standards California State Updating for each regulations (only minor changes)
11 October 2022 Fuel Economy/CO2 India The Ministry of Road Transport and Highways published a draft notification in July 2022, and provisionally set the enforcement of the standards to start for all new vehicles from 1 April 2023.
The conformity of production requirements are outlined in the AIS-149, as a finalized draft in July 2022.
3 October 2022 Emission Standards Mexico Referred details of Emission standards and Fuel Regulations are updated according to the current status.
15 September 2022 Fuel Economy/CO2 EU Proposed changes to post-2025 targets, updated scope of CO2 regulation for med/heavy lorries and heavy buses, minor amendments are added.
5 September 2022 Emission Standards EU In May 2022, a new emisshin stage, Euro 6e, is defined.
1 September 2022 Fuel Economy/CO2 USA (Federal) 1. The proposed amendments to Phase 2 standards was published.
2. The most recent version of the GEM software, 4.0, is available.
11 July 2022 Emission Standards Brazil The latest amendments for PROCONVW L7 and L8 are added.
15 June 2022 Supplemental Information EU Vehicle Categories The referred rule is changed from directive 2007/46/EC to regulation 2018/858, and all portions in relation to the regulation are added/changed.