The idea is that the CRM classroom should be a safe zone in that individual delegates' views should not be referred back up to management so that action might be taken against a person because of something they said in class. But there is no 'law' or regulation that says this is how it will be.
The same ought to apply to the instructor. However, we once nearly lost a contract because one of my instructors said something in class that was reported back to airline management and they took offense.
I do not know of a text to support you, unfortunately.