For MSA events only, plus it's a bit confusing when it says no regulation can be found for mechanically heating tyres? What's that mean ? By having them connected to an engine? (basically a burnout) ?
As they could not find one, they have now 'clarified' the situation by stating 'by any means'...
MSA events means everything except the RWYB meets - so imagine a Top Fueller going down the track (or trying to) without doing a burnout. Result: a pedalfest as the driver comes on and off the throttle. A great way to kill a T/F motor...