In this Topic - names of tracks which you should use for a videoclip (movies).
At a group stage you should use for the one dance one track on a choice from two. The choice is made for you by organizers of league.
Since stages of knockout-system two opponents confer with each other concerning a choice of tracks for each dance. Here the full freedom in choosing is already given you. In a current of week after a toss-up of a stage you should inform the tracks chosen by you in a theme of the pair. The first track for the first dance. The second track for the Second dance and so on. Looking how many dances it is authorised at this or that stage of league. If you did not manage to choose tracks in a current of week after a toss-up, for you it will make appeal committee.