From what I can discern, CRT isn't a single discrete thing, it's a range of teaching with widely varying syllabi.
It's a bit like banning "assault rifles", you have to define the term, because it isn't a clearly define thing otherwise. And in defining it, you make it still vague, someone makes the same rifle without a "pistol grip" and they are off.
We had to endure day long "diversity training" things at work that look like CRT, but we were adults, and paid little or not attention. Even had we bought in, it had naught to do with the job anyway.