Between sets 1 and 2 of a regional tournament, the first referee noticed that team A’s Libero jersey #99, which had been worn by one player in the first set, was now being worn by a different player. When questioned by the second referee, the coach stated that the club’s director had only budgeted one Libero jersey per team.

Since the tournament desk was nearby, it didn’t take very long for the head referee to come to the court and make a ruling on the situation. Since this was a “friendship” tournament, she decided to allow multiple players to share the same Libero jersey, but only one person per set. The second set commenced on time.

Question #1: Given the head referee’s ruling and assuming that the deciding set (#3) was played, how many different players could have served as team A’s Libero in that match?

Question #2:  If it had been announced at the beginning of the tournament that multiple players would be allowed to share the same Libero jersey, even during the same set, how many different players could have served as team A’s Libero during a three-set match?  [Hint: the correct answer is not “infinitely many.”]

Question #3:  If this anomaly had been discovered in the middle of set 2, without any temporary rule modifications to the USAV Domestic Competition Regulations in place for this tournament, what action should the first referee have taken?