All clubs in the 1989–90 Premier Division season competed and the two group winners and runners-up qualified to the semi-finals. Both semi-final ties were decided on penalties and Hibernian beat St Mirren 2–0 in the final to win their first Sixes title.
Rangers breached tournament rules again by fielding a weakened team. The rules declared all teams must include first team players, but Rangers only selected a total of four.[17]