UCI CYCLING REGULATIONS  Chapter X RACE CLOTHING  16.10.001  For race clothing provisions, articles 1.3.026 and the following apply.  16.10.002  For all sport classes in road events, athletes are required to wear a helmet in the correct  sport class colour, or use an appropriately coloured helmet cover, as follows:  16.10.003  Athletes competing on a tandem must wear identical race clothing (jersey, shorts),  except case described in article 1.3.063.  16.10.004  It is mandatory for cyclists who use catheters or other urinary diversion devices to  prevent spillage by using a catheter bag at all times. This includes during training,  competition and classification. Use of Catheters  Tandem  (article introduced on 01.10.13)  Red  C5  men / women  T2  men  H4  men / women  B  men  White  C4  men / women  H3  men / women  B  women  T2  women  Blue  C3  men / women  H2 men  T1 women  Black  H5 men / women  C2  men / women  T1 men  Yellow  C1 men / women  H2 women  Green  H1 men  Orange  H1  women  The athletes’ sport classes are recognisable by using the above-mentioned helmet  colours, which enable the commissaires and public to detect without delay and confusion  the group they belong to. Athletes using the wrong colour helmet in road events will not  be allowed to start or will be withdrawn from the race and disqualified.  (text modified on 26.06.07; 01.02.09; 01.01.10; 01.07.10; 01.10.13; 01.02.14; 01.01.16)  (text modified on 01.10.13 ; 01.10.13)  E0121  PARA-CYCLING  63 