Not sure if it’s still that way but a track can require it. My son Matt was required to put one on years ago. His car ran 6.54 and Greg told him to put one on, so he did. Honestly it a great rule and my save your car someday.
I totally understand the reason behind them and have no issue putting one on just wish I would have known before when the car was sitting all winter. Now with work all week I'm probably going to miss next two races.
