Choirs may participate in one  of the following categories:

A. Mixed choirs – adults – all singers must be above 18 years old.
B. Equal voices choirs – adults (male, female)
C. Youth choirs 13-19 years old
D. Children Choirs 6-15 years old
E. Chamber Choirs – 12-20 singers
X. Non-competitive choirs – participation in Gala and 2 additional concerts

In categories A-D 15% of the singers may be older or younger than above requirements.
All singers must be amateurs. Graduates of Vocal departments of  Musical Academies are not allowed.
This rule does not apply to conductors.

Detailed informtion about the categories you may find in the Rules