The league is part of the Welsh Football League System . Despite its name, the league covers only the south of Wales. It lies below the League Of Wales and above the parallel Gwent County League, South Wales Amateur League, and South Wales Senior League. The Cymru Alliance and a number of regional leagues are its equivalents in the north.
The league is made up of three divisions (named the First Division , the Second Division and the Third Division ) each having 18 clubs. There is promotion and relegation between the divisions, with the top three teams in each division being promoted to the one above and the bottom three being relegated to the one below. The winner of the First Division is promoted to the national League Of Wales , the highest level of Welsh football. The bottom three teams in the Third Division are relegated to the appropriate parallel regional league running below the Welsh Football League. The champions of the feeder leagues are promoted subject to ground criteria being met.
