 The judging panels of acrobatic gymnastics are similar to other disciplines of gymnastics where different panels of judges are overseen by a head judge, and each panel has a 'Chair of the Judging Panel' (CJP) who oversees that panel's activities.In acrobatic gymnastics, there are then difficulty judges (DJ) who only assess the difficulty of the elements in the routines; artistic judges (AJ) who only assess the performance and artistic merits of the routine; and execution judges (EJ) who only judge what points should be deducted based on imperfect execution of individual elements in the routine.The numbers of each type of judge on an acrobatic panel depends on the level of the competition and can vary from one to many (with the exception of the Chair, as there is only one CJP per panel).