These control circles do not normally appear on the competitors' maps. Negated controls 2.3.1 Discrepancy in overprint, misplacement or removal of any markers at a control site during the competition, negates that control for all. The time of travel between the start and finish, within a defined maximum, is irrelevant to the competition result. Acceptable course length is from 1000 - 3500m. Any potential competitor should be warned prior to entry if this will be exceeded.
Planners can consider mandatory rests with refreshment and shelter, or vehicular transfer.
There may be a need for extra manual assistance over difficult terrain. Steep areas, sand or deep mud caused by rain for example. Any variation in maximum allowance should be generous, taking into account the length of the course, the amount of climb and the condition of the tracks and paths etc. Any delays to the competitor caused by organisational oversight must be recorded and deducted from that competitor's overall time. It is the duty of escorts to give physical assistance to any competitor if required.