Thomas Bach,the International Olympic Committee (IOC) boss says a three-person panel will have the final say on which Russian athletes can compete at the Rio Games.
The IOC said individual sports' governing bodies must decide if Russian competitors are clean amid claims of state-sponsored doping.
More than 250 Russian athletes have so far been cleared to compete.
The three-person panel that must pass the athletes comprises Ugur Erdener, president of World Archery and head of the IOC medical and scientific commission, Claudia Bokel of the IOC athletes commission, and Spanish IOC member Juan Antonio Samaranch Jr, son of the ex-IOC president who uses the same name.
Meanwhile, the World Anti-Doping Agency (Wada) had recommended all Russian athletes be banned after its independently commissioned report found evidence of a four-year "doping programme" across the "vast majority" of Olympic sports.