Edit request on 9 April 2012 

The article states that only one Libero player is allowed per team.  However, Beginning in 2008 for FIVB competitions, and beginning in the 2011-2012 for USAV competitions, two liberos are allowed per team, although only one may play at a time.  In fact, FIVB rules _require_ two liberos to be designated if a team has more than 12 players on the roster.

FIVB refernce:  http://www.fivb.ch/thegame/TheGame_VolleyballRules.htm
USAV reference: http://usavolleyball.org/news/2011/03/09/usav-rules-commission-meeting-highlights/41322

The article also states that the rule allowing Liberos to serve has trickled down to juniors competitions.  That is not entirely true.  USAV rules do not allow Liberos to serve in any sanctioned event, although AAU Volleyball does allow Liberos to serve.  Many USAV regions allow Liberos to serve in events that do not serve as USAV National qualifiers.

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