The double-amputee runner, who has been charged with the shooting death of his girlfriend, Reeva Steenkamp, was cleared by a court to leave South Africa to compete in track meets while awaiting trial.
Pistorious had appealed against some of his bail conditions, and a judge ruled Thursday that Pistorius can travel outside of South Africa to run, but with certain conditions.
IAAF spokesman Yannis Nikolau said in a statement that there would be no objection from the world body to Pistorius competing at the worlds, saying "on the basis of the 'innocent until proven guilty' principle he would be free to run."
Nikolau says the decision on whether Pistorius could run at other events would be at the "discretion of meeting organizers" and not the IAAF.
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