With the sponsorship of Domminion Breweries and the growth of popularity of the Twenty/20 format the NOCA introduced a Twenty/20 tourament during the 2005-2006 season. All four Senior Club teams play in a knock-out round, with the winners playing in the final on the same day. The two non-finalists then play each other to detirme the third and fourth placings. Games are played on the Centennial Park Oval and the back field at Centennial Park.