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A National Olympic Committee (NOC) may enter up to 3 qualified athletes in each individual event if all athletes meet the A standard, or 1 athlete per event if they meet the B standard. An NOC may also enter a maximum of 1 qualified relay team per event. NOCs may enter athletes regardless of time (1 athlete per sex) if they have no athletes meeting the qualifying A or B standards.

The qualifying time standards were obtained in various meets during the qualifying period that have the approval of the IAAF, all approved outdoor meets and indoor meets with the exception of 100m, 200m and 110/100m hurdles races are eligible. The qualifying period for the 10,000m, marathon, walks and combined events is from Jan 1, 2011 to July 8, 2012, for all other individual events it is May 1, 2011 to July 8, 2012. Relay qualification is between Jan 1, 2011 to July 2, 2012.