How old does a driver need to be?

[Larry Curtis]

Originally Posted by wildchild22

A 17 can enter into a National as long as their 18th birthday is on or before the day of the event...this was my down fall when i won the race of champions...a mere 43 days short of competing in Pomona for the World Championship, but i believe as long as you have a drivers license you can race everything but a professional category, with the appropriate license of course

Is Stock a professional category? I thought it was classified as sportsman.