How is high jump run, and how are ties decided?

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Safety: the Chief Judge (or association equivalent) ensures the landing area is satisfactory and the uprights and crossbar are in good condition, and may caution an athlete using an unsafe technique and, if necessary, not allow them to continue. Validity and heights An athlete may start at any height above the minimum and jump at their own discretion at any later height. Three successive failures, not necessarily at the same height, disqualifies the athlete from competing further. If the bar falls off without being knocked by the athlete (for example in strong wind), the athlete is not penalised. Before the competition the judge announces the starting height and the heights to which the bar will be raised at the start of each round. It is recommended that the bar rises in 5cm increments until four or fewer athletes remain, then 2cm increments until one remains. A sole remaining athlete who has won may choose the increments. Check the bar height at both ends for level and in the centre for height. Measure in whole centimetres, perpendicular from the ground to the lowest part of the top side of the bar. Technique by age: scissors only for Under 8, Under 9 and Under 10; any legal technique for Under 11 and above where flop mats are provided. Ties The athlete with the fewest jumps at the height where the tie occurs ranks higher. If still tied, the athlete with the fewest total failures up to and including the last height cleared ranks higher. If still tied, they share the place. There is no jump-off for placings. If the result decides progression to the next level, a jump-off should take place. It does not affect placings.