What can get a BMX freestyle rider warned or disqualified?

• Who decides: the commissaire appointed to manage the competition. The judges score, and the commissaire handles the clock, time-outs and penalties.
• The three measures: "an official warning, disqualify or refuse the start".
• Grounds: not respecting the equipment rules, the published schedule, restricted areas, time limits or the start order.
• More grounds: deliberate damage to equipment or the venue; taking part under the influence of alcohol; smoking in the riders' area or on the field of play; obscenities, insults or obscene gestures.
• The catch-all: any other behaviour against the fair conduct of the competition or the reputation of the sport.
• Officials: insults or disrespect directed at the judges or other officials may be penalised.
• Aggression: "neither verbal nor physical aggression will be tolerated; exclusion from the competition or event area will be immediate".
• No protest: the commissaire's decision to warn, disqualify or refuse a start "can not be protested".
• A warning stays: it is noted on every result that lists the rider.
• The second time: after an official warning, "any further misconduct" in the same event results in disqualification.
• The judges: nobody may approach or speak to the judging panel during the competition.

The glossary has the commissaires panel and BMX freestyle.

A judged contest depends on the judges being left alone to judge, so the conduct rules protect them and the timetable. Giving one official the last word keeps a small event moving, and the warning that turns into disqualification gives a rider one clear chance to stop.