UCI CYCLING REGULATIONS  Chapter VIII TRACK RACES  16.8.001  Track events are only open to athletes part of the sport classes C and B.  16.8.002  Starting blocks must be used for all sport classes during the following track events:  individual pursuit, first rider of the team sprint and kilometer/500 meters.  §1  Kilometer and 500 Meters  16.8.003 Races shall be for the following sport class and distances:  §2  Individual Pursuit  16.8.004  Races shall be for the following sport class and distances:  16.8.005  Considering the variety in the types of handicap in the “C” division, it is recommended to  match up athletes with similar handicaps during the qualification for the track individual  pursuit, in order not to penalise or favour certain athletes. This consideration will have  precedence in the pairing of the athletes.  16.8.006  When a factor is used for athletes' classification in the track individual pursuit, the  athletes will evolve alone in the finals (gold-silver), (bronze-fourth) if they are not part of  the same sport class and will be matched up only if they are part of the same sport class.  (text modified on 26.06.07; 01.02.08; 01.01.10; 01.01.16; 01.02.17)  A 15 seconds countdown will commence when the riders are secured on their bicycles  and ready to start. (article introduced on 01.01.09; text modified on 01.02.17; 01.01.21)  (text modified on 01.02.09; 01.01.10)  (text modified on 01.02.09; 01.01.10)  (article introduced on 01.01.09; modified on 01.01.10)  Sport Class  Distance  Tandem men – B  4000 m  Cycle men – C5; C4  4000 m Cycle men – C3; C2; C1  3000 m Tandem women – B  3000 m Cycle women – C5; C4; C3; C2; C1  3000 m  Sport Class  Distance  Tandem men and women - B  1000 m  Cycle men – C5; C4; C3; C2; C1  1000 m Cycle women – C5; C4; C3; C2; C1  500 m  E0121  PARA-CYCLING  55 