No need for back up lights on a racecar..................unless you burnout past the Christmas Tree or off the trailer..............for race cars that is. I guess inspections here in CA are a little less stringent.
I've been around horses long enough to know you never walk behind them. A friend had her face pushed in because she didn't follow that rule! About the only thing back up lights are good for is driving in an overcrowded parking lot.................so you can see who is leaving.
l'll have back up lights in my rear valence so that is covered by PA inspection laws but I am doing away with my side marker lights. I'm banking on no one noticing.