UCI CYCLING REGULATIONS  1.3.075 The characters, panels and plates shall be of the following dimensions:  1.3.076 Riders shall ensure that their identification number is visible and legible at all times. The  identification number shall be well fixed and may not be folded or altered.  1.3.077  The identification numbers provided by the organiser shall be used by riders without any  kind of alteration. They shall be issued free of charge by the organiser, after the rider's  licence has been checked by the commissaires' panel.  1.3.078 At World Championships, the identification numbers shall be provided by the UCI. The  advertising space shall be reserved for the UCI. 1.3.079 [article abrogated on 01.01.05]  1.3.080 Any rider dropping out of the race shall immediately remove his identification number.  84  GENERAL ORGANISATION OF CYCLING AS A SPORT  E0221  (text modified on 01.01.05)  (text modified on 01.01.05)  (text modified on 01.01.05; 01.01.17)  (text modified on 01.01.05)  (text modified on 01.01.01; 01.01.04; 01.10.09; 01.01.11; 13.03.15; 01.07.17; 01.01.19)  Body number  Frame number  & Helmet  stickers for  handcycle  Shoulder  number  Handlebar  number  Height  18 cm  15 cm MTB  9 cm  9 cm  15 cm MTB  20 cm BMX  11 cm Trials  Width  16 cm  14 cm MTB  13 cm  7 cm  14 cm MTB  25 cm BMX  16 cm Trials  Digits  10 cm  6 cm  5 cm  8 cm MTB  10 cm BMX  10 cm Trials  Line width  1,5 cm  0,8 cm  0,8 cm  1.5 cm MTB  1.5 cm BMX  1.5 cm Trials  Advertising  height 6 cm on  the lower part  MTB height 2.5  cm on the upper  and lower part  rectangle of  11x2 cm on the  lower or upper  part  height 1.5 cm  on the lower  and upper part  - MTB height 2.5  cm on the upper  and lower part  - BMX 6 cm on  the upper part  - Trials 2.5 cm on  the lower part 