I have no idea, what are they going to do?
. . . . . . . . . .
You apparently have not been following the news here on Planet Earth, where the general public seems to be moving towards the fanaticism of the "bunny hugger" / EPA environmentalist types.
The EPA has already gone after and punished folks who try and make their trucks run better, to the point it is getting very hard to find equipment to do that.
True, some of us live in outlying "no inspection" areas, so we can re-register our vehicles each year our registrations come up for renewal without having to re-install those damaging pollution control devices.
The EPA has already proposed legislation to make the entire country one "inspection" area. So far, we have been lucky; no Congressional action (yet). But the more the general public pressures Congress for SOME kind of action, the closer we are for that kind of law. So yes, those of us who have "deleted" trucks damn well better keep all the parts necessary to "restore" them - it IS going to happen - only question is when.
Here's something else to think about. To my knowledge, virtually every vehicle code in the country has provisions for "inspection stops". And has provisions making it against the law to alter the vehicle - like, for example, making more noise, smoke, etc. than "stock". That means your state and local law enforcement officer, if he was a mind to, can stop you any place any time for an "equipment check".
So the potential is out there even if the EPA dosnt get the control it wants as fast as it wants. How about we all try and keep a low profile.
I am going to leave the DEF tank on my vehicle, along with leaving the CAT (or something that looks like one) in my exhaust system just for such a possibility.