Wouldn't there be some kind of screening, I mean if Nissan is out on the track to set records you think there would be neutral inspectors of the car as well as participating in the event to ensure there was no shady gray area's nissan went into.
Just saying its kind of weird for Nissan to make such a claim, and build a car just for this specific reason and then in the end cheat over it.
Not saying its not possible but if they did thats pretty fucking stupid on they're part.