The chairman of the World Anti-Doping Agency's independent commission Dick Pound, has said the IAAF "must assume its responsibilities for what went wrong" in relation to allegations of corruption at the body over doping.
He also said the current president of athletics' governing body, Lord Seb Coe, is the best person to lead change at the organisation.
Senior staff at athletics' governing body must have known about doping taking place within the sport, an independent report has found.
A report is expected to reveal there is no way members of world athletics' governing body could have been unaware of the extent of doping.
Sebastian Coe has said he wished he did more to stamp out doping while a vice-president of athletics' governing body.