It applies the WKF rules.
Change Kata rules:
There is no distinction of compulsory (Shitei) Kata and free selection (Tokui) Kata.
Free choice of the Kata in each round.
Children to 11 years
Contestants must demonstrate at least 2 Kata in the change.
Cadets from 12 years
Contestants must perform a different Kata in each round.
Once performed a Kata may not be repeated.
Change Kumite rules:
Duration of the Kumite bout is defined in the invitation.
Competition rules: WKF Rules (1,1 MB, Acrobat Reader necessarily)