 Partnerships are judged on artistry/dance (worth 10.0 points out of 31.5) execution of skills (marked out of 10 and doubled to give 20.0 points out of 31.5) and difficulty of skill (worth 1.5 out of 31.5).The rules for the sport, known as the Code of Points, are governed by the Fédération Internationale de Gymnastique.These rules are subject to change every four years in line with the Olympic cycle, as in other disciplines of gymnastics.