What to know about the Libero:

The libero (LEE-bear-o) is a back row specialist, who has additional substitution abilities and fewer attacking possibilities.  The purpose is to allow a defensive specialist to have a greater effect on the game.

1) The rule will be the Libero and 12 substitutions (not normal 15)

2) Designation of the Libero player is required per match - not per game or tournament

3) Uniform: (player must use the same shirt number if two or more sets of uniforms are used.)  The ideal scenario - 11.3.2.1- The Libero must war a different color uniform, shirt, or jacket, in contrast to the other members of the team (or with a different design).  'contrasting color' is the key phrase.  A shirt of the same color with a slightly different design will not meet the criteria.  There needs to be a very distinct/noticeable difference for the officiating crew to identify the Lebero apart form the rest of the players.  Options (jacket) could be a vest over the uniform.  Keep in mind it will still be necessary to meet the required uniform rules for contrast size and placement of the numbers

4) Libero's can: (11.3.2.3.)

• Replace any player in a back-row position.  The Libero is a replacement, not a substitute. 
• Replacements involving the Libero are NOT counted as a regular substitution (unlimited)
• At the beginning of the game, the Libero can replace a player after the second referee has checked the line-up
• Before the Libero can re-enter for a different player, one rally has to be completed.
• Time for the re-entry is while the ball is out of play and before the whistle for service
• The Libero can only be replaced by the player whom he/she replaced
• The replacements can only take place by the sideline in from of his/her team bench between the attack line and the end line

5) Libero's cannot: (11.3.2.2.)

• The Libero may only perform as a back-row player.
• The Libero cannot complete an attack hit from anywhere, if at the moment of contact, the ball is entirely above the top of the net
• The Libero cannot serve, block, or attempt to block.
• A teammate may not complete an attack-hit, when at the moment of the attack-hit, the ball is entirely above the top of the net, if the ball is coming from an overhand finger pass by a Libero in the front zone.  The ball may be freely attacked if the Libero makes the same action from behind the front zone.

6) Injured Libero: (11.3.2.4)

• With previous approval form the first referee, the injured Libero (the position-not the number or jersey) may be reassigned for a player not on the court at the time.
• The injured Libero may not re-enter to play for the remainder of hte match
• The reassigned Libero must remain the Libero for the remainder of the match.