The following marks are the A and B qualification standards for the 2013 World Championships in Athletics.
Each country may send a maximum of four athletes who have attained the A qualification mark in each specific event.
Area Champions (i.e. athletes who have won an event at their continental level championships) are granted automatic entrance, irrespective of whether they have achieved the qualification marks.
The reigning World Champion in each event is also granted a bye into the competition, and does not count as part of their country's quota of athletes in that event.
Furthermore, host countries may enter one unqualified athlete if no one of the respective nationality has achieved the required mark.