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)  Update
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 Update
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 Update
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 Update

Date Regulation Region Updated Summaries
03 December 2018 Fuel Economy/CO2 EU 1) A draft regulation on post-2025 targets for passenger cars and LCVs has been published.
2) In October 2018 the EU Council's position on the proposed regulation was published
28 November 2018 Fuel Economy/CO2 USA (Federal) On 1 October 2018 EPA published a proposed rule which contains minor technical amendments to the current fuel economy standards for light duty vehicles from model year 2017 to 2025.
19 November 2018 Emission Standards Brazil 1) On 26 October 2018 a proposal to introduce new two stages of emissions standards planned to be effective from 2022 and 2025 was published.
2) OBD Br+ was amended from OBDBr-2 and applied from 1 January 2018
3) A proposed law was prepared in 2011 to re-introduce the sale of diesel light duty vehicles. However, as of the end of 2018 no further information on the status of this proposal is available
13 November 2018 Others WLTP 1. Amendment 3 [12] was incorporated into existing GTR 15 and published on 1 February 2018 [11].
2. The test cycle name for class 3 vehicles is changed to make better correlation between vehicle class name and test cycle name [11].
3. Amendment 3 [12] introduced the improvement of gear shifting procedure.
31 October 2018 Emission Standards USA (California State) 1. The OBD II requirements as of October 2018 are updated.
2. The LEV III FTP and SFTP requirements are updated.
3. The information about ZEV programme as of October 2018 is updated.
4. The members of so called CARB states (Section 177 states) were updated.
22 October 2018 Fuel Economy/CO2 USA (California State) 1. As for the California Phase 2 light duty vehicles standards, the CARB Board did not agree to the EPA proposal to keep the federal MY 2020 Phase 2 standards unchanged for MY 2021 to MY 2026 and decided to keep the original Phase 2 standards in place through to MY 2025.
2. The California Phase 2 heavy duty vehicle programme was approved by the Board in February 2018; the rule should be finalized by the end of 2018.
18 October 2018 Supplemental Information EU 1. The present EU directive 2007/46/EC for the type approval of motor vehicles is updated.
2. A new regulation, 2018/858 [6], was published in May 2018 and contains updated provisions for the EU type approval of motor vehicles. This regulation will be in force from 1 September 2020.
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].