Will disabled runner start in Being?

In January I posted an item on the South African amputee Pistorius. His ambition to run in Being was blocked by an IAAF ruling. However, thanks to a ruling of the Court of Arbitration for Sport (CAS) his dream is back again. They ruled that, based on the evidence by the experts, there is no ground for the IAAF ruling that stated that his blades will give him an advantage.
Now he has the posibility to get him self on the South African team if he manages to bring down his PB from 46.46 to at least 45.95.