special backrounds for racing nationals

i looked at a bike and i the owner told me he raced it as a pro independant and he said he raced the bike at two nationals during the 2001 season. now i saw the post about this bike that mxracer bought from a pro that had the backrounds on it that have teh little oval with ama written in it. i dont remember seeing that on this bike and was wondering if you had to have that to race at the nationals or if that was like something that you bought as an extra. this will determine the kids credibility and prolly help determine whether i buy the bike from him. so please try to help in any way you can. thanks

ok but i was just wondering because i wanted to know if he was telling the truth you know. i mean its a used bike that is in excellent shape reguardless. but it doesnt matter to me whether he is actually pro just if he was telling the truth. thanks for the help.