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Summary
DescriptionSection 177 states (2019).svg
English: States complying to California emissions regulations for vehicles. Because California had emissions regulations prior to the 1977 Clean Air Act, under Section 177 of that bill, other states may adopt the more stringent California emissions regulations as an alternative to Federal standards. These are sometimes known as 'Section 177' states.
Blue (#8383f3) = California LEV standards only
Green (#83f383) = California LEV and ZEV standards
Gray (#d3d3d3) = default (adherent to Federal standards only)
Red (#f38383) = California standards adopted and later repealed
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States complying to California emissions regulations for vehicles. Blue = LEV standards only; Green = LEV and ZEV standards; Red = LEV standards adopted then later repealed.