Point will be scored on each rally. If the receiving team wins the rally, they score a point and gain the serve. Substitution System Rule 11.3 is amended to reflect the use of the Libero Defensive Player in the United States Rules. These rules will be in effect for the 1999 USA Volleyball Open Championships, Open Division and, beginning November 1999, for any USA Volleyball Open competition. Any team participating in Open Competition has the option to register a Libero player on its roster.
Regular substitutions remain limited to six team subs and one individual entry per player.
Only one Libero will be allowed per team. There are special rules if the Libero player is injured and cannot continue. The Libero player's number must be placed on the line-up sheet for the first game of each match, in addition to the numbers for the starting six players. The Libero may replace any player in a back row position. The Libero may not serve, block or attempt to block.