South Africa's Semenya approached the tribunal in May last year, after CAS - sport's highest court - ruled that World Athletics regulations were necessary for athletes with differences in sexual development (DSDs) to ensure fair competition in races ranging from 400m to a mile.
The tribunal found the requirement of subjecting certain female athletes to drug or surgical interventions as a precondition to compete does not amount to a violation of Swiss public policy, Semenya's lawyer says.
