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 Update
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 Update
France General
Non-EU Switzerland General
Norway General
Americas North America USA
(CAFE, etc)
Federal Update
California State
Canada General Update
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
28 July 2020 Fuel Economy/CO2 EU In February 2020, a draft amendments was published to aim at allowing the European Commission to carry out easier verification and matching of the data relating to CO2 emissions and fuel consumption of new heavy duty vehicles reported by EU Member States and manufacturers. Also in February 2020, an additional proposed regulation for implementing the monitoring and reporting provisions, was published to outlines the procedure which will be used by European Commission to verify the data on CO2 emissions and fuel consumption from heavy duty vehicles.
20 July 2020 Emission Standards China On 14 May 2020, the Ministry of Ecology and Environment published an announcement containing limited amendments to the implementation dates for the China 6 standards. All new vehicles have to comply with the requirements of Phase 6a, nationwide, from 1 July 2020.
13 July 2020 Fuel Economy/CO2 Canada 1) For light duty vehicles, the Canadian Environment Department , taking into account that the US EPA had been reviewing the GHG standards for model years 2021 and after, has been conducting a consultation process since August 2018 to assess if the light duty GHG standards for 2022 to 2025 remain appropriate.
2) Phase 2 standards for heavy duty vehicles except trailers , which are in line with the equivalent US standards, will be introduced starting on 1 January 2021.
13 July 2020 Fuel Economy/CO2 USA (Federal) The explanation was added to “programme flexibility” for light duty vehicles, based on the amended SAFE rule.
29 June 2020 Fuel Economy/CO2 USA (Federal) Amendments to the CO2 emissions and fuel economy standards for light duty vehicles for model years 2021 to 2026 were published, in final form, in April 2020.
08 May 2020 Emission Standards EU 1.An initial assessment, with regard to the development of post-Euro 6/VI emissions standards for light duty and heavy duty vehicles, was published by the European Commission at the end of March 2020.
2.Test procedures to measure CO2 emission by passenger vehicles and light commercial vehicles were updated.
08 May 2020 WLTP World The GTR 15 (WLTP) [15] reflecting amendment 5 [16] was globally registered on 23 September 2019.
12 March 2020 Fuel Economy/CO2 EU Regulation 2020/22 , published in January 2020 contains updates on monitoring and reporting requirements for light commercial vehicles those are type approved in a multi-stage process, as well as on the calculation of the CO2 emissions targets for these vehicles for the years 2021 to 2024.
27 January 2020 Fuel Economy/CO2 EU Regulation 2019/1859, which applied from 10 November 2019, details the data that will be used to assess the representativeness of the reference CO2 emissions for the calculation of the CO2 emissions targets for new heavy duty vehicles to be reported to the European Commission by manufacturers.
17 January 2020 Fuel Economy/CO2 USA (Federal) The EPA is currently prevented from enforcing the Phase 2 standards for trailers. This relates to a stay of these provisions granted by the US Court of Appeals in response to a petition filed by the trailers' manufacturers which argues that the EPA lacks the authority to regulate trailers, as they are not self-propelled vehicles.
14 January 2020 Fuel Economy/CO2 USA (California State) In December 2019, CARB published an update to suspend the implementation of the Phase 2 trailer standards for model years 2020 and 2021.
2 December 2019 Fuel Economy/CO2 China In July 2019, new fuel consumption standards for both motorcycles and mopeds were published. These standards will be mandatory for new type approvals from 1 July 2020 and for all new vehicles from 1 August 2021.
19 November 2019 Emission Standards EU A corrigendum to regulation 2018/1832 was published in October 2019 and amends the date for the last registrations for stages BH and BI as shown in Table 2.
11 November 2019 Fuel Economy/CO2 USA (California State) In a Federal Rule published in September 2019, the EPA withdraws California's Clean Air Act Preemption Waiver. By this rule, the federal fuel economy and CO2 emissions standards for passenger cars and light duty trucks is enforced in all States.
08 November 2019 Fuel Economy/CO2 USA (Federal) 1) Part of the provisions contained in the SAFE proposal was issued as a final rule in September 2019. A national programme for fuel economy/GHG standards will be applied and enforced in all States. This rule is applicable from 26 November 2019.
2) As of October 2019, the amendments to the fuel economy standards for model years 2021 to 2026 are still being finalized; they are due to be published in a separate final regulation.
24 September 2019 Fuel Economy/CO2 EU 1.Monitoring and reporting of CO2 emissions and fuel consumption for heavy duty vehicles will be required starting on 1 January 2019.
2.CO2 emissions targets for heavy duty vehicles will be in place from 2025.
30 August 2019 Emission Standards EU 1) The European Commission prepared a proposal in June 2019 that will amend the main Euro 6 regulation, 715/2007, introducing the conformity factors within this regulation and therefore allowing the discrepancy between real driving emissions and emissions determined under laboratory conditions. The type approval procedure and the introduction dates for the Euro 6 stages will remain unchanged.
2) According to a note from the European Commission published in May 2019, the implementation dates for stages BH and BI will be amended to 31/8/2020
15 August 2019 Fuel Economy/CO2 USA (California State) 1. In July 2019, CARB reached a voluntary framework agreement with four major vehicle manufacturers on the standards for light duty vehicles up to 2026MY.
2. The final approval to the phase 2 standards for heavy duty vehicles was filed in February 2019 and the standards are effective from 1 April 2019.
08 August 2019 Emission Standards China PC & LDT 1. Early introduction of the China 6b standards in Beijing, Shenzhen, Tianjin and Guangdong province was reported.
2. The information about adjustments made to the RDE test emissions values during the "extended" ambient conditions was added.
02 August 2019 Emission Standards India The final AIS-137, Part 3 [15] was published in April 2019 and covers the test procedures required for type approval and conformity of production in respect of the BS VI standards, including requirements for the OBD (on-board diagnostics) system, in-service conformity and test procedures for hybrid electric vehicles (HEV) except details of RDE test.