The International Association of Athletics Federations (IAAF) will not appeal the one-year ban handed down to Tyson Gay for doping which has put the United States’ second-place finish in the 4x100 metres relay at the 2012 London Olympics in jeopardy.

Gay was banned for one year following a 2013 positive test for an anabolic steroid and stripped of all results from July 2012.

The 31-year-old was banned by the US Anti-Doping Agency (USADA) subject to appeal by the IAAF or WADA.

“After careful review, the IAAF has decided that the one-year sanction applied in the case of Tyson Gay was appropriate under the circumstances and in accordance with IAAF Rules,” it said yesterday.

“Consequently, the IAAF decided not to exercise its right of appeal.”

Although IAAF rules state that all relay members lose their medals from a competition if there is a doping violation, the IOC has control of the medals for the Olympics and it has not always taken medals from all relay members.

Gay has already returned his silver medal to the US Olympic Committee, but still to be determined is whether his team mates – Trell Kimmons, Justin Gatlin and Ryan Bailey – as well as Jeff Demps and Doc Patton, who ran in the preliminary rounds, will lose their medals.

If the United States is disqualified, third-placed Trinidad and Tobago would be eligible to gain the silver medal, and fourth-place finisher France could receive the bronze.