The League aims to promote and develop competitive team swimming in children between the inclusive ages of 9 to 12 years old. Age groups are based 14th September 2013 . As such, it is referred to as a development league. The league runs with two divisions of three separate rounds (and three simultaneous galas), usually held June - September. The teams swim relay, medley races, with each swimmer covering 25m. In addition the 10, 11 and 12 year old swimmers swim individual 50m races for the four strokes, whilst the 9 year olds swim a mixed freestyle and medley (consisting of 2 girls and 2 boys). The final event is a very exciting squadron relay, consisting of 8x25m, with a girl and a boy of each age group, swum in ascending age order. The events are scored by awarding (in a six team gala) 6 points to the first team and so on. Totaling these points for each teams, then league points are allocated for each team in a similar manner. League points are totaled across rounds, and these totals determine which gala they attend later in the league. In the final round, the top teams swim against each other, and so on. Gala points are doubled for that round, and the top gala teams are awarded bonus league points each to ensure separation. The winners of placings in those finals determine the final positions in the league. Full details of the scoring are found in the League Rules.