Pistorius was controversially banned from competing in January by athletics' governing body the IAAF who argued that the carbon fibre blades he runs on gave Pistorius an advantage over able-bodied athletes.
Pistorius succeeded in having the ban overturned by CAS which criticised the tests carried out by the IAAF to measure the runner's performance levels.
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Following the announcement of the CAS verdict in May, the South African athletics federation agreed to extend Pistorius's qualifying deadline to July 17.
Pistorius said on Wednesday that he expects to hear the final decision on the relay selections by Sunday.