The National Bicycle Association (NBA), later known as the National Bicycle Motocross Association (NbmxA), was a United States–based Bicycle Motocross (BMX) sports sanctioning body originally based in Soledad, California, that was created by Ernie Alexander in 1973 and ceased operations as an independent body in 1981. It was the first and for its first few years until 1980 the largest sanctioning body in the United States concerning BMX. It was known for its pioneering works in founding the organized sport of BMX. It was both the first true sanctioning body and the first nation-spanning one (as opposed to the regional ones that emerged), although at first it was concentrated in the west coast of the United States, where it was founded. It was the first body to hold true nationals in which racers coming from all over the country competed for points and in the case of professionals, money, to determine who would earn the right to run a National no. "1" plate in the several divisions and age classes the following year. It was the first sanctioning body to have a professional division, which was created as far back as late September 1974.