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UN Regulations

UN Regulations Home Regulations UN Regulations UN Regulations Trends on Harmonization of Vehicle Standards at UN How to confirm the adoption status of UN regulations Conference Schedule How to access to Working Documents of UN regulations Amended Regulations in the past (Provided by: JASIC) *This information is updated monthly based on JASIC's "Automotive Regulations Information Web Service."*From March 2025, the update period cha...

Regulations Updated at: 2025/06/24

Emission Standards - USA (Federal) Passenger Cars & Light Duty Trucks

t-duty trucks (HLDT) up to 8,500 lbs & MDPV up to10,000 lbs 0.5 Low Temperature CO Emissions CO emissions for gasoline vehicles are regulated at low temperature using a test over the FTP, carried out at 20 °F. The CO emissions limits are 10 g/mile for LDVs and LDT1s.For LDT2s, LDT3s and LDT4s and MDPVs the limits is 12.5 g/mile [1]. For these standards a useful life of 50,000 miles applies. These Tier 2 cold CO requirements have been car...

Regulations Updated at: 2024/12/13