UCI CYCLING REGULATIONS  A banner shall also be used for any finish or for the passing of any intermediate point for  a classification as well as at the top of mountain passes during road races. Should the  banner have disappeared or been damaged, a black and white chequered flag shall be  used.  For road races two panels placed on each side of the road can be used instead of a  banner to indicate the intermediate and mountain passes. The panels must be of  sufficient height to guarantee their visibility by the riders and follow vehicles.  (text modified on 01.01.05; 01.07.11; 01.01.15)  1.2.102 (N) A photo-finish with electronic timing strip is required for the following events:  -  road races  -  track races  -  Olympic and Paralympic Games, world championships and world cup  mountain bike events  -  BMX races.  For cyclo-cross world cup events, only a photo-finish is obligatory.  (text modified on 01.01.04; 01.01.05; 01.01.06)  (text modified on 01.01.05)  (text modified on 01.01.05)  (text modified on 01.01.05)  1.2.103 The film, the electronic timing strip and any other medium on which the finish is recorded  shall be deemed to be valid documents. They may be consulted by all parties concerned  if the finishing order should be disputed.  Time-keeping  1.2.104  For each race, the national federation of the organiser shall designate a sufficient number  of timekeeper-commissaires duly licensed by it. Timekeeper-commissaires may be  helped in matters other than time-keeping operations proper by other persons licensed  by the national federation of the organiser.  1.2.105 Timekeeper-commissaires shall record the times on a form that they shall sign and hand  to the finishing judge.  1.2.106 Times shall be taken using an electronic time-keeping machine.  In track races and mountain bike downhill and four cross (4x) races, times shall be taken  to the nearest 1000th of a second.  In other races, the times shall be taken to the nearest second at least. Results shall be  communicated to the second.  Moreover, manual time-keeping will be undertaken whenever deemed necessary or  useful.  1.2.107 When several riders finish in a group, all riders in the same group shall be credited with  the same time.  E0221  GENERAL ORGANISATION OF CYCLING AS A SPORT  42 