IMSA
The International Motor Sports Association (IMSA) is a North American various auto racing sanctioning body based in Daytona Beach, Florida, United States of America. It was started by John Bishop, a former executive director of SCCA (Sports Car Club of America), and his wife Peggy in 1969 with help from Bill France, Sr. of NASCAR. Beginning in 2014,[1] IMSA is the sanctioning body of the WeatherTech SportsCar Championship, the premier series resulting from the merger of Grand-Am Road Racing and the American Le Mans Series presented by Tequila Patrón.
SCCA
The Sports Car Club of America (SCCA) is an American automobile club and sanctioning body supporting road racing, rallying, and autocross in the United States. Formed in 1944, it runs many programs for both amateur and professional racers.