OK - I'm going to try to calm anyone down who is alarmed by this:
Remember what Ron was always on about - making things as easy to reverse as possible for Smog/inspection states? That's what the deal is here...partially.
"They" want to try to improve emissions to meet global emissions agreements - which means they want big oil and the carmakers to keep producing. This is SPECIFICALLY from what I can tell an attempt to get the people who drive Civics (or whatever) with ridiculous "fart cannon" (as a friend of mine puts it) mufflers/exhaust on their street cars. They'll be going after the Coal Rolling crowd too.
The best way to keep your "tuned" ride legal is to make it LOOK as stock as possible...and this is where our wee groove shines.
Unless you're looking for it, unless you've been told where to find it, unless its clearly obvious at a roadside stop...you'll have no problems.
Get rid of those cold air kits/drop-in reusable filters, those exhaust cutouts, whatever else that advertises on close or not so close inspections that you've done something to enhance performance of your car or truck...and you'll more likely than not be fine and keep smiling at the gas pump and/or when you stomp that gas pedal.
we're heading into some tough times and they're going to be looking to you to put your money into building the economy back better, because they're all tapped out or don't want to pass the cost on to too many future generations. but by keeping under their radar, doing what you can to quietly show them you know what they're playing at and have been doing a better job than any of their new laws ever could, you'll likely have the least amount of disruption to your finances and lives and rides.
Hope this helps.
Be careful and safe out there, friends.