UCI CYCLING REGULATIONS  A prior written agreement has to be concluded between the club and the sponsor.  (text modified on 01.01.00)  Conversely, concerning road cycling and more specifically for “grands tours” only, it shall  be the teams that are required to differentiate their jersey from that of the individual  general classification leader’s jersey.  (text modified on 01.01.05; 01.01.16)  However, spaces are reserved for use by the riders/teams, as described in the “UCI  jerseys visual guidelines” brochure published on the UCI Website. The principal  partner(s) of a team shall stand out there from all other advertisements.  This provision shall also apply to the skinsuit worn by the leader on which spaces are  also reserved for use by riders/teams on the lower part (shorts), as described in the “UCI  jerseys visual guidelines” brochure published on the UCI Website.  (text modified on 01.01.00; 01.01.05; 01.01.16; 08.02.21)  (text modified on 01.01.99)  (text modified on 01.01.05)  1.3.055 1. The designs of the leader's jerseys for UCI cups, series and classifications are  bis determined by the UCI and are their exclusive property. They may not be reproduced  without UCI authorisation.  1.3.055 In time trial stages, leaders may wear the aerodynamic jersey or skinsuit of their teams  if the organiser does not provide an aerodynamic leader's jersey or skinsuit.  1.3.054 The wearer of the leader's jersey shall be entitled to match the colour of his shorts to that  of the jersey.  1.3.053 (N) Advertising on a leader's jersey shall be reserved for the organiser of the race.  1.3.052 (N) An individual general classification leader's jersey shall be mandatory.  1.3.051 A classification leader's jersey in stage races must be sufficiently distinct from those of  the teams and clubs, as well as from national jerseys, world champions' jerseys and  those of UCI cups, series and classification leaders.  1.3.050 [article abrogated on 01.01.05]  1.3.049 The name, logo or trade mark of the sponsor(s) may be used freely on the jersey. In  addition the jersey may bear other lettering which may even differ from one race or  country to another, without any limitation on the number.  § 4  Leaders' clothing  Stage races  UCI cups, series and classifications  E0221  GENERAL ORGANISATION OF CYCLING AS A SPORT  76 