Clutch safety switch 69 Dart

Took my 69 Dart with a 4 spd to the track last night for the first time in a couple years. When I went through tech they are now requiring a clutch safety switch so the car can't be started in gear. Is there a simple way to do this on a car that didn't come with one?
If this is a fairly close to stock car I think you could argue the point, as the car never came with one. Frankly I think it is preposterous. Does that track require them on EVERY car? Dragsters? The pro cars? Other / older vintage?