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Regulations for Emissions from Vehicles and Engines

Proposed Rule for Technical Amendments to the Light-duty Vehicle Greenhouse Gas Program

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Rule Summary

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EPA is proposing corrections to fix two technical errors in the light-duty vehicle GHG emissions standards regulations finalized in the 2012 rulemaking establishing standards for model years 2017-2025 light-duty vehicles. First, EPA proposes to correct regulations pertaining to how auto manufacturers must calculate credits for the GHG program's optional advanced technology incentives. The equation in the regulations currently in place result in auto manufacturers receiving fewer credits than the Agency intended for electric vehicles, plug-in hybrid electric vehicles, fuel cell electric vehicles, and natural gas fueled vehicles. Second, the equation in the regulations regarding how manufacturers must calculate certain types of off-cycle credits contain an error and are inconsistent with the 2012 final rule preamble, raising implementation concerns for some manufacturers. The proposed amendments would clarify the calculation methodology in the regulations.

Comment Period Extended until November 30, 2018

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