For the athletics competitions at the 2000 Summer Olympics, the following qualification systems were in place.

Qualifying standards A National Olympic Committee (NOC) may enter up to 3 qualified athletes in each individual event if all athletes meet the A standard during the qualifying period. An NOC may also enter a maximum of 1 qualified if they have met the B standard. An NOC may also enter a maximum of 1 qualified relay team per event. NOCs may enter athletes regardless of mark (1 athlete per gender) if they have no athletes meeting the entry standard. This makes it possible for every nation to have a minimum of one representative of each gender in the sport.http://www.trackandfieldnews.com/images/stories/tfn_pdfs/ogqualifying_standards.pdf

The qualifying time standards may be obtained in various meets during the given period that have the approval of the IAAF. All approved outdoor meets and indoor meets with the exception of 100 m, 200 m and 110 /100 m hurdles races are eligible.

For the relays, the top 16 teams in each division were accepted.

The NOCs are still allowed to select athletes using their own rules, on the condition that all of them have made the qualifying time. For example, the United States selects athletes based on the results of the 2000 United States Olympic Trials event. Sweden only enters athletes deemed good enough to reach at least the eighth position, based on an assessment by the Swedish NOC.

The IAAF Qualifying Standards were as follows:

Men's eventsWomen's events Event A Standard B Standard Event A Standard B Standard100 m10.2710.40100 m11.4011.60200 m20.7020.90200 m23.2023.50400 m45.8046.20400 m52.2053.20800 m1:46.301:47.20800 m2:00.502:02.501500 m3:36.803:39.501500 m4:08.004:12.005000 m13:29.0013:34.005000 m15:35.0015:55.0010,000 m28:10.0028:28.0010,000 m32:30.0033:20.00110 m hurdles13.7013.85100 m hurdles13.1013.40400 m hurdles49.9050.20400 m hurdles56.1457.143000 m steeplechase8:27.008:30.70———Marathon2:14:002:20:00Marathon2:33:002:45:00High jump2.282.25High jump1.931.88Pole vault5.605.45Pole vault4.304.20Long jump8.057.95Long jump6.656.50Triple jump16.8516.65Triple jump14.1513.95Shot put19.7019.30Shot put18.3017.95Discus throw63.5062.00Discus throw61.0058.00Hammer throw75.5072.50Hammer throw65.0063.50Javelin throw82.0077.50Javelin throw60.5057.00Decathlon80507800Heptathlon60005750

References