We implement to the rules of 50th Bieg Piastów (all distances):
Based on the general rules issued by the International Ski Federation (FIS), a competitor may not use any fluorine waxes. The organiser may carry out a spot check for the presence of prohibited fluorine on the skis of the competitor before or after the race. If the result of the test shows fluorine levels above the specified limit, the competitor will be excluded from the start or disqualified from the race.