In the case of the CAI on the ITA Hondas at the ARRC, it was determined to be illegal even though they had run that way in another division for some years. The only divisional difference there was the willingness of someone to Protest at the ARRC.
It seems that you are implying that them running it for some years makes it legal. And that is not correct.
It had just never been protested, even years prior at the ARRC.