Defending Bristol dirt race champion Kyle Busch wonders if NASCAR drivers need a refresher course on the rules.

Busch, who’ll try and make it two in a row on the dirt at Bristol Motor Speedway on Sunday, acknowledged that NASCAR’s rules process is front-and-center these days of punishment and appeals.

Last week, it was Hendrick Motorsports getting its points penalties on all four drivers rescinded by an appeals panel. This week, its Denny Hamlin’s appeal for his actions at Phoenix last month upheld by a three-person panel.

And Hendrick teams are on the clock again after NASCAR docked the teams of Alex Bowman and William Byron 60 points apiece Thursday for illegal modifications in the greenhouse, or center area, of the car after Richmond last week.

Hamlin detailed his strategy, ultimately unsuccessful, on his podcast after the hearing. He compiled nearly three dozen examples of past NASCAR incidents like he had with Ross Chastain at Phoenix.

“He had 35 examples,” Busch said Saturday. “I wonder how many of them were me?”

Probably a few. The bigger issue for Busch and all competitors is staying on the right side of NASCAR’s complex rule book.

“If we’re supposed to be self-policing, how are we supposed to do that?” Busch said. “Tell me what is and isn’t OK.”

Bowman was the points leader leaving Richmond and slid to seventh after the NASCAR penalties. He’s off to the best start of his Cup Series career and is not frustrated with the scrutiny. “I feel like my team, we did a really good job of overcoming the first one and staying plugged in and not letting it get to us,” he said at Bristol. “I’m confident we can do that throughout the second one as well.”

Hendrick Motorsports said it would decide on a possible appeal after Bristol.

Right now, the job for all competitors is figuring out how to best handle NASCAR’s lone dirt layout on the schedule.

That was evident a year ago when Busch was likely out of the mix on the final lap as leaders Tyler Reddick and Chase Briscoe closed in on the finish line. But both slid from contention on the slippery surface and Busch cruised into the winner’s circle.

Kyle Larson, the winner last week at Richmond and the 2021 NASCAR champion, would love his chances if he drove a standard dirt cart sliding through the corners of the half-mile track.