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 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) Update
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
01 October 2018 Fuel Economy/ CO2 USA (Federal) 1) The EPA and NHTSA Safer Affordable Fuel Efficient (SAFE) Vehicles Proposed Rule was published in August 2018. 
2) The fuel economy targets established for model year 2020 would also apply for model years 2021 to 2026.
3) The exclusion of air conditioning refrigerant leakages, methane and nitrous oxide from the calculation of GHG emissions starting with model year 2021 is also proposed.
4) The EPA is also proposing the withdrawal of California's Clean Air Act Preemption Waiver, so that standards can be set and enforced at a national level.
21 September 2018 Fuel Economy/ CO2 China 1) Phase 3 fuel economy standards for heavy duty vehicles were published on 6 February 2018; they will apply for new type approvals from 1 July 2019 and for all new vehicles from 1 July 2021.
2) The fuel consumption limits for goods vehicles, buses, dump trucks and articulated trucks are detailed in this report.
21 September 2018 Emission Standards EU 1) Commission Implementing Regulation 2018/1002 [26] and 1003 [27] of 16 July 2018 was published to amend Implementing Regulation 2017/1153 and 1152 respectively to clarify and simplify the correlation procedure between NEDC and WLTP.
2) The implementation dates of the preliminary and final OBD thresholds are clarified.
10 September 2018 Emission Standards USA (Federal) Several minor clarifications and corrections to the Tier 3 standards for light duty vehicles were conducted based on Federal Register
22 August 2018 Fuel Economy/ CO2 EU 1) A draft regulation containing CO2 emissions targets for heavy duty vehicles was published in May 2018.
2) Monitoring and reporting of CO2 emissions and fuel consumption for heavy duty vehicles will be required starting on 1 January 2019.
7 August 2018 Emission Standards China HDV The final China VI standards were released in June 2018 and are due to be implemented from 1 July 2019.
23 July 2018 Fuel Economy/ CO2 Canada Phase 2 standards for heavy duty vehicles, which are in line with the equivalent US standards, will be introduced starting on 1 January 2020.
13 July 2018 Emission Standards China 1. In May 2018 it was reported that the city of Shenzhen, in south China, will implement the China 6b standards from 1 July 2018 for light duty diesel vehicles and will be in place on 1 January 2019 for gasoline light duty vehicles.
2. There are also reports that the city of Guangzhou is planning early implementation of China 6b, starting from 1 January 2019.
10 July 2018 Emission Standards India 1. The information of BS IV standards is updated.
2. A finalized draft of the part of this standard relevant to light duty vehicles (Part 3) was published in March 2018. The draft regulation covers test procedures required for type approval and conformity of production in respect of the BS VI standards.
26 June 2018 Fuel Economy/ CO2 India Phase 1 fuel economy standards for heavy duty vehicles are in place from 1 April 2018. Phase 2 standards will be in place from 1 April 2021.
29 May 2018 Emission Standards EU 1) A draft regulation [24], containing amendments to the new Euro 6 implementing regulation, 2017/1151, was published in March 2018. 2) The proposed amendments are updated provisions on the implementation of the WLTP test cycles, the RDE 4th package, a new procedure for the assessment of in-service conformity (ISC) and requirements for on-board monitoring of fuel and/or electric energy consumption. After the draft is examined by the European Parliament and Council [25], the regulation is expected to apply from 1 January 2019.
29 May 2018 Fuel Economy/ CO2 EU A new regulation detailing the requirements for determining CO2 emissions and fuel consumption of new heavy duty vehicles was published in December 2017 and will be phased-in over the period from 1 January 2019 through to 1 July 2020, depending on the type of truck and its production date.
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.