Olympic officials have stopped short of imposing a complete ban on Russia from the Rio de Janeiro Games - instead, it will be the responsibility of each sporting federation to check the doping records of Russian competitors.
What have the IOC said?
The International Olympic Committee has been under huge pressure to throw Russia out of the Games after a second World Anti-Doping Agency-funded investigation found proof of a doping programme directed by the Russian state.
But at its second emergency meeting in a week, the executive board opted against a collective sanction and asked all international sports federations affected by Russia's cheating to make their own judgements on eligibility against a set of strict criteria.
A statement from the IOC after Sunday's meeting said: "Entry (to the Rio Olympics) will be accepted by the IOC only if an athlete is able to provide evidence to the full satisfaction of his or her international federation."
So who has been banned?
Russia's track and field athletes have already been banned by the IAAF and other federations now face a race against time to establish those Russians who meet the criteria set out to allow them to compete in Brazil.
The statement also confirmed that Yuliya Stepanova had been barred from the Games despite the athlete blowing the whistle on the Russian doping programme.
The IOC said: While it is true that Stepanova's testimony and public statements have made a contribution to the protection and promotion of clean athletes, fair play and the integrity and authenticity of sport, the rules of the Olympic Charter related to the organisation of the Olympic Games run counter to the recognition of the status of neutral athlete."
They have expressed gratitude to Stepanova and said they will help her find a new country to compete for.
What conditions will other athletes to meet?
The federations have been told not to accept the absence of a positive drugs test from an athlete's record as sufficient to grant access to the Games.
Each athlete's respective doping record will again be taken into account, with federations asked to analyse "reliable, adequate international tests" - not those conducted within Russia.
Any athlete or official implicated in the McLaren report should be excluded, and the Russian Olympic Committee will be unable to select any athlete who has been sanctioned for doping in the past, even if they have served any prior punishments.