The IAAF delayed implementing a rule limiting women’s testosterone levels from Nov. 1 until March due to a legal appeal from Olympic 800m champion Caster Semenya and South Africa’s track and field federation.
The IAAF expects a hearing in Semenya’s case in February with a verdict by March 26.
“The IAAF remains very confident of the legal, scientific and ethical bases for the regulations, and therefore fully expects the Court of Arbitration for Sport (CAS) to reject these challenges,” the IAAF said in a press release. “However, the IAAF also understands that all affected athletes need certainty on the point as soon as possible.