UCI CYCLING REGULATIONS  specificities regarding the events registered on the calendar.  (text modified on 1.01.02; 1.01.05; 1.01.17; 23.10.19).  International Calendar  Category  of event  Class  Participation  Olympic games  ME  WE  JO  - As per part XI  World championships  ME  WE  MU  MJ  WJ  CM  - National teams, in accordance with the  world championships (see part IX)  Continental  championships  ME  WE  MU  WU  MJ  WJ  CC  - National teams, in accordance with the  continental championships (see part X)  Continental games  JC  - National teams, in accordance with the  specific regulations of the event  Regional games  JR  - National teams, in accordance with the  regional games (see part X)  UCI WorldTour  ME  1.UWT  2.UWT  - UCI WorldTeams (see Art. 2.15.127)  - Invited UCI ProTeams  - National team of the organising country in  events determined by the PCC  UCI Europe Tour  ME  MU  1.Pro  2.Pro  - UCI WorldTeams (max 70%)  - UCI ProTeams  - UCI continental teams of the country  (1) - UCI cyclo-cross professional teams of the  country  (1) - Foreign UCI continental teams (max. 2)  (1) - National team of the country of the organiser  4  ROAD RACES  E170421  (text modified on 1.01.02; 1.01.05; 1.01.06; 1.08.13; 1.01.15; 1.03.16; 1.01.17).  (text modified on 1.01.02; 1.01.03; 1.01.04; 1.01.05; 1.01.17).  (text modified on 1.01.99; 1.01.05; 28.04.05; 1.01.07; 12.06.20).  2.1.005 International races and participation  2.1.002 A continental circuit is composed of all elite (ME) and all under 23 (MU) men’s road races  of the continental calendar of each continent. These circuits are respectively known as  Africa Tour, America Tour, Asia Tour, Europe Tour and Oceania Tour.  2.1.003 In order to be registered on the international calendar, a race must guarantee the  participation of at least 10 teams, among which 5 foreign teams. A mixed team is  regarded as a foreign team if the majority of its riders are of foreign nationality.  2.1.004 A mixed team is composed exclusively of riders belonging to different teams eligible for  participation according to article 2.1.005, with the exception of teams and riders  registered with the UCI, and whose team is not contracted in the race. Riders shall wear  an identical jersey which may bear advertising for their usual sponsor. It may not in any  circumstances be a national jersey. 