The following rules have been extracted from the UCI Cycling Regulations which can be viewed in full or downloaded at: www.uci.org/inside-uci/constitutions-regulations/regulations

Chapter I – Participation

5.1.001 The category which will be applied for entries to races for the entire season is the category to which the rider will belong on 1 January of the following calendar year.

For 2021, rider selection will be based on the following years of birth:

CATEGORY YEAR OF BIRTH
Women and Men Masters 35 – 39 years 1983 to 1987
Women and Men Masters 40 – 44 years 1978 to 1982
Women and Men Masters 45 – 49 years 1973 to 1977
Women and Men Masters 50 – 54 years 1968 to 1972
Women and Men Masters 55 – 59 years 1963 to 1967
Women and Men Masters 60 – 64 years 1958 to 1962
Women and Men Masters 65 – 69 years 1953 to 1957
Women and Men Masters 70 – 74 years 1948 to 1952
Women and Men Masters 75 +  years 1947 and before

All riders aged 35 and over may ride in the UCI masters cyclo-cross world championships. However, the following riders are not eligible:

1. Any rider who has ridden in the UCI cyclo-cross world championships, continental championships or UCI cyclo-cross world cup during the current year,

2. Any rider, who has been a member, during the current cyclo-cross season, of a team registered with the UCI,

3. Any rider classified with at least 100 points in the UCI individual cyclo-cross ranking published after the first UCI cyclo-cross world cup event of the current cyclo-cross season.

In races other than the UCI masters cyclo-cross world championships, riders may participate with a temporary or daily licence, issued by their national federation.

The licence must clearly state the starting and finishing dates of its period of validity. The national federation shall make sure that the holder of a temporary licence will, for the duration of his licence, benefit from the same insurance cover and other benefits as those attached to an annual licence.

Chapter IV UCI MASTERS CYCLO-CROSS WORLD CHAMPIONSHIPS
(chapter introduced on 16.06.14)

5.4.001 Only licence holders under articles 1.1.001 to 1.1.028 and 5.1.001 may take part in the UCI masters cyclo-cross world championships. A race number is only issued on presentation of the licence.

5.4.002 The riders taking part in the UCI masters cyclo-cross world championships represent their country, but are permitted to use the equipment of their choice.

5.4.003 All details specifically relating to the UCI masters world championship must be obtained from the organiser or from the UCI website.

5.4.004 The UCI masters cyclo-cross world championships are usually organised in 5 years age groups: 35-39, 40-44, 45-49 etc. Age groups will be combined when less than 6 riders enter an age group. In case of combined age groups titles for the respective 5 years age groups will be awarded (even when only 1 rider is entered).

(article modified on 26.06.18).

Anti Doping Regulations.

Anti Doping Control will be carried out at the event by the International Testing Agency (ITA) in accordance with UCI Regulations.

It is the Riders Responsibility to present themselves at the Doping Control Station as soon as possible and at the latest within 30 minutes of finishing the race. Selected riders must remain in sight of their designated chaperone at all times.

Riders selected for Anti Doping can be identified on a list by their race number or ranking. If applicable, the list will be posted at the event HQ and the Doping Control Station immediately after the race.