To reflect the wider structural changes that were happening across South African cricket, from the 2004-05 season the competition was re-organised to mirror both the Four-Day and T20 leagues.

The six newly created, entirely professional, franchises would take part in the tournament, with the former provincial teams continuing in a separate semi-professional CSA structure.

In the 2007–08 season, Zimbabwe took part in the competition as a seventh side, playing both home and away fixtures.

[2] Domestic cricketing reforms were introduced in 2020 that discontinued the six franchise team format and began a return to the more traditional provincial based system.

The 15 teams that take part are: Points system: In the event of teams finishing on equal points, the top three places are determined in the following order of priority: (taken from Cricket South Africa Summer Handbook 2011–2012[4])