Clean Air Act of 1963
Air Quality Act of 1967
Clean Air Act of 1970
Clean Air Act Amendments of 1977
Clean Air Act Amendments of 1990
The Air Pollution Control Act of 1955
We did not reach this point by the Executive Branch alone, nor by just the Current Administration.
Oh, I thought this was a new set of rules imposed by the EPA which is not a legislative body.
I did not realize the states were only now defying a 1990 law passed by Congress