The Indianapolis 500 itself, however, remained under the sanctioning control of USAC. It became the lone top-level race the body still sanctioned, as it ultimately dropped all other Indy car races (as well as their stock car division) to concentrate on sprints and midgets. For the next three years, the race was not officially recognized on the CART calendar, but the CART teams and drivers comprised the field. By 1983, an agreement was made for the USAC-sanctioned Indy 500 to be recognized on the CART calendar and the race awarded points towards the CART championship.
the indianapolis 500 itself however remained under the sanctioning control of usac it became the lone top-level race the body still sanctioned as it ultimately dropped all other indy car races (as well as their stock car division) to concentrate on sprints and midgets for the next three years the race was not officially recognized on the cart calendar but the cart teams and drivers comprised the field by 1983 an agreement was made for the usac-sanctioned indy 500 to be recognized on the cart calendar and the race awarded points towards the cart championship