I think you have to check with the promoter of the race. He will help you get the contingency stuff filed. Keep in mind....sometimes you have to "register" for it BEFORE the race.
With that said, I'm gonna turn this into a flame. Contingencies have ruined racing..............................huh? Bill, what the %%&* are you talking about? What's wrong with "free" money.
Here's what's wrong: Becasuse some get paid for finishing in the top 3 positions in a race, you now have:
-B-Class riders in the C Class
-A-Class riders in the B Class
-Ex pro riders in the A Class.
In other words.......... SCUMBAG SANDBAGGERS!!
It used to be "of honor" to say "I ride in the A-Class". Now it's of false honor to gloat "I'm an A-Class rider sandbagging in the B-Class for $$$.
And some racing organizations refuse to do much, if anything about it. :( :think