Choirs may participate in maximum two of the following categories:

A. Mixed choirs – adults – all singers must be above 18 years old.
B. Equal voices choirs – adults (male, female)
all singers must be above 18 years old.
C. Youth choirs 13-19 years old
D. Children Choirs 6-16 years old
E. Chamber Choirs – 12-20 singers
S. Senior Choirs (60% members older than 60 years old) – minimum 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. In categories A-D choirs must consist of at least 16 singers.
All singers must be amateurs.
This rule does not apply to conductors.