There is a fourth class of pro called Veteran Pro. These are professionals in the 20" class that are at least 30 years old and generally past their racing prime but still love to compete. Most of the rules that apply to the "A" and "AA" pros apply to the "Vet" Pros except that they are required to race in only six national events plus the Grand Nationals and are classified as "A" Pros and get "A" Pro points, However, they can win unlimited prize money as a Vet pro on this "A" Pro level without the requirement of moving up to "AA" pro upon winning US$3000 in a season. Some Vet Pros are retired "AA" pros that have come back to the sport. In those cases they had to go through a reclassification process with certain criteria having to be met, including written permission from conventional "A" Pros. "Vet" Pros cannot compete for the National #1 Championship.