The World Anti-Doping Agency will not appeal banned American sprinter Tyson Gay's controversial one-year doping ban.
The global agency said the ban, which has been widely criticised in Europe as too lenient, was "compatible with the World Anti-Doping Code."
Gay, the world's joint second fastest man, last month had accepted the one-year suspension by the US Anti-Doping Agency after a 2013 positive test for an anabolic steroid.
The ban was backdated to June 23, 2013, making the US 100 metres record holder eligible to return to running later this month.
His first race will be a 100 metres at Lausanne's Diamond League meeting on July 3rd.
Normally athletes receive a two-year suspension for their first major doping offense but under anti-doping rules the ban can be reduced for substantial cooperation.