Racewalking is a progression of steps so taken that the walker makes contact with the ground, so that no visible (to the human eyes) loss of contact occurs. The advancing leg shall be straitened (i.e.not bent at the knee) from the moment of first contact with the ground until the vertical upright position.
This is the international rule of walking. It simply means:
a). The walker must never have both feet off the ground at the same time. (CONTACT).
b). The advancing leg must be straight from the first moment of contact with the ground until directly under the body. (KNEES).
These are the only rules for which an athlete may receive a report. The term REPORT means one of both or the rules have been broken. The term CAUTION means a warning, the rules haven't been broken. but by continuing in that manner they most probably will be.
An athlete may safely receive 2 CAUTIONS from every judge, 1 for contact and 1 for knees, but if three REPORTS are received, the athlete will be disqualified. A judge must not report an athlete more than once in an event.
In normal conditions there are seven judges, including the chief judge. Six of these judges will be spaced around the track, leaving the chief judge to move around the track during the race. The chief judge will also be at the start and finish if the race accompanied by one other judge This ensures that no athlete can gain an unfair advantage at the beginning or end of a race.