All athletes competing at a bid-qualifying event must be listed on the official roster as active athletes and compete on Day 1. Should a team need to make any substitutions on Day 2 at the bid-qualifying event, they will be allowed to replace a limited number of active athletes with reserve athletes for the second performance. The athletes that took the floor on Day 1 will be considered the original team members on the Worlds Roster. Any reserve athletes that take the floor on Day 2 will be considered eligible substitutes on the Worlds Roster.