college mechanics differences

[Nevadaref]

Another difference that I have noticed is that the NFHS manual says not to switch on a foul called by any of the three officials which will cause the ball to go from the backcourt to the frontcourt.
In college games I mostly see no one switch if the Lead calls this foul, but they do seem to switch if the C or T makes the call.
Is this the correct college procedure or are the guys just switching when they technically shouldn't be?