I think if I am reading this right this is pretty huge
WHAT ARE THE NEW GUIDELINES?
In 2018, any driver who scores Cup points will be barred from competing in the final eight races of the Xfinity and Truck Series in 2018 (that’s the regular-season finale and the playoffs).
It says ANY driver. That would cover a hot shot Xfinity driver that is going to cup. Teams can legally run 5 cars for a few races, Hendrick and Gibbs recently ran Elliott and Jones in a few cup races when they were full time in Xfinity. This rule would have excluded them from all of that, 8 races, playoffs, etc. yikes, doesn't look like much of that will be happening anymore.