The International Association of Athletics Federations will not appeal Tyson Gay's reduced one-year ban for doping, saying the American anti-doping authorities properly handled the former world 100-metre champion's case.
The 31-year-old Gay, who is set to return from his suspension in next week's Diamond League meeting in Lausanne, received a reduced ban for co-operating with the U.S. Anti-Doping Agency's investigation.
In a brief statement on Thursday from Monaco, the IAAF says the sanction "was appropriate under the circumstances and in accordance with IAAF rules. Consequently, the IAAF decided not to exercise its right of appeal."
The World Anti-Doping Agency decided June 4 that it would not appeal.
Gay tested positive for an anabolic steroid at the U.S. championships last year and was stripped of all of his results since July 2012.