Teams involved in the league are primarily made up of youth players from the S.League clubs.
[1] All S.League teams had to register a minimum of 15 and a maximum of 20 players for the Prime League.
Clubs not participating in the S. League had to register a minimum of 15 and a maximum of 25 players.
The foreign players must have been aged between 18 and 21 at the point of registration and are not eligible to play in the S.League.
Prime League sides were also allowed to take part in the FA Cup competition.