Ireland's Jessica Kurten is free to compete again after the Court Of Arbitration For Sport was forced to temporarily lift her two-month doping ban.
The move comes after the sport's governing body, the FEI, was unable to attend a scheduled hearing of the German-based rider's case.
The stay on the penalty will come into affect on Tuesday. Kurten was handed the ban after the discovery of a banned substance in a test returned by her horse at an event in France last year.
The ban would have covered the period of the Olympic Games, but Kurten had made herself unavailable for selection before the controversy began.