who has the power to disqualify the athlete in race walking during the competition
Racewalking There are judges on the course to monitor form. Three judges submitting "red cards" for violations results in disqualification. There is a scoreboard placed on the course so competitors can see their violation status. If the third violation is received, the chief judge removes the competitor from the course by showing a red paddle. For monitoring reasons, races are held on a looped course or on a track so judges get to see competitors several times during a race. A judge could also "caution" a competitor that he or she is in danger of losing form by showing a paddle that indicates either losing contact or bent knees. No judge may submit more than one card for each walker and the chief judge may not submit any cards; it is his or her job only to disqualify the offending walker. Disqualifications are routine at the elite level, such as the famous case of Jane Saville, disqualified within sight of a gold medal in front of her home crowd in the 2000 Summer Olympics, or Yet Lyu, disqualified 20 meters before the finish line at the 2017 World Championships in Athletics.
Paavo Nurmi Paavo Johannes Nurmi (Finnish pronunciation: [ˈpɑːʋo ˈnurmi] ( listen); 13 June 1897 – 2 October 1973) was a Finnish middle- and long-distance runner. He was nicknamed the "Flying Finn" as he dominated distance running in the early 20th century. Nurmi set 22 official world records at distances between 1500 metres and 20 kilometres, and won nine gold and three silver medals in his twelve events in the Olympic Games. At his peak, Nurmi was undefeated at distances from 800 m upwards for 121 races. Throughout his 14-year career, he remained unbeaten in cross country events and the 10,000 m.