Cameron van der Burgh of South Africa won the gold medal and set a world record in the 100m breaststroke at London 2012, but has since admitted to cheating after the Austrialian swim team accused him of taking more dolphin kicks than allowed by the rules.
Reports claim that he will not be stripped of his gold medal because the time to submit an appeal has long passed, and there is no appeal system in place to warrant such an action. However, medals have been stripped from those that took performance-enhancing drugs.
If this is the case, then how does the IOC/governing bodies have power to strip medals from those who admitted/proved to doping but not from those who admitted/proved to such cheating?