EPA Removing ‘Ancient Engine’ Exemption

CSMS # 56840547 announced that the EPA (Environmental Protection Agency) rule “Control of Air Pollution From New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards” was finalized on January 24, 2023 and became effective on March 24th, 2023. This rule eliminated the exemption for ‘ancient engines’ in non-road vehicles. An ‘ancient engine’ is defined as an engine first manufactured at least 21 years and still in its original configuration. The identical configuration exemption will continue to be available to allow importation of nonconforming engines. This change will become effective in U.S. Customs & Border Protections (CBP) ACE (Automated Commercial Environment) software in August of 2023.

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