The Court of Arbitration for Sport rules against Blake Leeper competing in Olympic Games and World Athletics Series Competitions with current mechanical aids (prosthetics) World Athletics’ rules permit competitive use of aids such as prosthetics if they do not give the user an artificial competitive advantage over those not using such aids. The Court of Arbitration for Sport (CAS) has rejected Mr Leeper’s argument that those rules are designed to discriminate against disabled athletes, and instead has fully accepted that they are intended