NASCAR has firmly shut the door on driver antics under caution-flag periods as well as bumping on pit-road after last weekend's AutoTrader EchoPark Automotive 500. The aftermath of the 500-mile-long race saw two drivers, namely Hendrick Motosport's William Byron and 23XI Racing's Kurt Busch substitute Ty Gibbs, receive hefty penalties after the race in Fort Worth, Texas ended.The two drivers were penalized for separate incidents during the race, with Byron facing the governing body's reprimand for spinning Denny Hamlin out in a late caution period. The #24 Chevrolet Camaro ZL1 driver loses 25 driver and team points as a result along with a $50,000 fine. Byron drops from being 17 points above the cutoff for the Round of 8 to 10th on the list as he heads into the Yellawood 500 this Sunday. Hendrick Motorsports also indicated their plans on appealing the penalty earlier this week.NASCAR@NASCARNEWS: William Byron has been fined $50,000. The team has been assessed with the loss of 25 driver and 25 owners points.2432289NEWS: William Byron has been fined $50,000. The team has been assessed with the loss of 25 driver and 25 owners points. https://t.co/CfAQbh87iv23XI Racing's Ty Gibbs received a slap on the wrist for banging doors with Ty Dillon on the pit road, which caused Dillon to veer dangerously close to crew members working on another car in a nearby pit stall. Gibbs did not receive any driver points deductions as he does not gather any points in the Cup Series, being an Xfinity Series regular. 23XI Racing, however, was stripped of 25 owner points.FOX: NASCAR@NASCARONFOX"Pit road is not the place to fool around." @keselowski shares his thoughts on Ty Gibbs and the penalty issued by #NASCAR. #RaceHub@jamiemcmurray | @regansmith | @shannonspake35348"Pit road is not the place to fool around." @keselowski shares his thoughts on Ty Gibbs and the penalty issued by #NASCAR. #RaceHub@jamiemcmurray | @regansmith | @shannonspake https://t.co/nH2qKDsamQNASCAR claimed not to have seen the incident between Denny Hamlin and William Byron during the race and did not allow Hamlin to re-take his original position during the caution period. This confused the fraternity and the resulting penalty came rather as a cover-up to their earlier blunders. Byron and Hamlin ultimately finished in P7 and P10 respectively.NASCAR Vice President explains the course of action if the Byron-Hamlin incident was realized during the raceScott Miller, senior vice president at NASCAR, elaborated on what the governing body would have done had the yellow flag incident between William Byron and Denny Hamlin been realized by the officials during the race and said:“If we had seen that good enough to react to it in real-time, which we should’ve, no excuse there, there would probably have been two courses of action. One, would’ve meant to put (Denny) Hamlin back where he was, or the other would be to have, make William (Byron) start in the back.”Watch the complete interview below:Bob Pockrass@bobpockrassNASCAR Senior VP Scott Miller explains what NASCAR likely would have done if they had realized before going back to green that William Byron had spun Denny Hamlin and why they don’t have a live feed of all in-car cameras with their current monitor system in the tower.29037NASCAR Senior VP Scott Miller explains what NASCAR likely would have done if they had realized before going back to green that William Byron had spun Denny Hamlin and why they don’t have a live feed of all in-car cameras with their current monitor system in the tower. https://t.co/OR8TmsKJWHNASCAR will go live from Talladega Superspeedway this Sunday for the Yellawood 500 at 2:00 pm ET on the USA Network.