> That means that they are required to have cats.
>
> > In some places, that mandates retaining the cat,
>
> No, in ALL places that mandates retaining the cat.
>
> >because you can't get a registration without it.
>
> Federal law prohibits modification to the emission control system
> on _any_ car driven on public roads. Individual states do not
> have the option of repealing Federal safety and emission
> regulations within their borders. A state may make laws that are
> more stringent than the Federal ones - as California does - but
> they may not go in the opposite direction.
> Jay
It's also against Federal law to replace a properly functioning cat.
You are NOT allowed to replace a cat unless it is defective.
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