 The CSA competitions are predominantly contested by South African provincial teams, the number of which has been fixed at thirteen since the 2007–08 season.A non-South African team, Namibia, has competed since the 2006–07 season, while two invitational teams from Zimbabwe competed in the early seasons.Prior to the introduction of the CSA competitions, the South African provincial teams competed in the Sunfoil Series (better known as the Currie Cup) and the domestic one-day tournament (known under various names).