Unless the Rules have changed in New England, any car you brought to the table in ITE was supposed to be legal for some other sanctioning bodies class plus DOT tires. I have a feeling it has morphed from IT-Enduro (I think the original nomenclature) to more of an IT-Everything as Greg points out...meaning like Glenn said, if you meet IT safety regs and you are running on DOT tires, you are basically free to run-whatcha-brung.

I think it's a cool catch-all but be prepared to be at the slow end of a GT1/GT2 run group.