USAV rules for playing volleyball differ somewhat from NFHS volleyball rules.
Here are the most common differences in rules for the 2007-2008 volleyball season.
center line characteristics
USAV
line must be solid
NFHS
may be solid or shadow-bordered
extended attack lines
USAV
required for nationally sanctioned competitions, optional for other competitions
NFHS
not addressed
ceiling obstructions
USAV
ball is in play above 23 feet. Judgement for replay below 23 feet
NFHS
ball is in play
warm up area
USAV
Rules for playing volleyball state the team warm up area starts at the end of the team bench area, and must not be nearer the court than the front of the team bench
NFHS
the warm up area must be in a non-playable area
temperature
USAV
minimum 50 degrees F
NFHS
not addressed
exposed cable
USAV
must be clearly identified
NFHS
must be covered
net markings
USAV
not specifically addressed by rule
NFHS
not prohibited by rules
net posts
USAV
distance from sideline is 20 to 39 inches
NFHS
distance from sideline is a minimum of 3 feet
roster changes
USAV
After roster is submitted, uniform number is correctible, but no player changes are allowed.
NFHS
Rules for playing volleyball state a roster violation or additions result in a loss of rally.
when rosters are due
USAV
10 minutes prior to start of match
NFHS
10 minutes prior to start of timed warm up
limit to team members
USAV
team is limited to 15 players and 5 coach/staff
NFHS
no limit to the number of players on a team, or the number of coach/staff
number of players
USAV
must have 6 players to start the match. Must have 6 eligible players to continue play
NFHS
must have 6 players to start the match. May continue with less than 6 players
Expulsion and Disqualification
USAV
no penalty point. Volleyball rules require disqualified team members must leave playing, bench, warmup, and spectator areas for the remainder of the match.
NFHS
loss of rally/point is assessed when a disqualification occurs
use of red and yellow cards
USAV
USAV rules for playing volleyball state cards are only to be used by the first referee.
NFHS
Cards are carried by both officials. Umpire uses cards to signal need for sanction to referee.
number placement on uniform front
USAV
numbers must be centered on the front of the jersey
NFHS
either on the shoulder, or no more than 5 inches below the bottom edge of any neckline, ribbing, or seam
libero uniform
USAV
Volleyball Rules for the libero say the libero shorts may differ from teammates. liberos shirt must always display a visible number.
NFHS
libero's shorts must be like-colored to teammates. Libero may have two uniform numbers, one as libero, one as non-libero.
teams to end line at end of games
USAV
teams do not go to end line at the end of game. Teams do go to end line at end of match
NFHS
teams go to end line at the end of all games
length of timeouts
USAV
30 seconds. No warning whistle is blown.
NFHS
60 seconds. Warning whistle is blown at 15 seconds before end.
Time out ending early
USAV
No
NFHS
Yes, if both teams are ready to play.
Multiple substitution procedure
USAV
Rules in volleyball state that only one incoming substitute for a team can be in the substitution zone at a time.
NFHS
all incoming substitutes may enter the substitution zone at one time.
exceptional substitution
USAV
doesn't count as a team substitution. Player replaced by exceptional substitution may not return to that match.
NFHS
Counts as a team sub if fewer than 18 have been used. Player replaced by exceptional substitution may not return to that game.
maximum team substitutions
USAV
12 team volleyball substitutions with unlimited entries
NFHS
18 team substitutions with unlimited entries
illegal substitutes
USAV
team delay sanction
NFHS
unnecessary delay (timeout)
libero as captain
USAV
not allowed
NFHS
allowed
libero serving
USAV
libero may not serve
NFHS
libero may serve in one rotation in a game
libero replacements
USAV
A rally must always take place between two libero replacements
NFHS
A rally must always take place between two libero replacements unless the next action the libero will take is to serve.
toss for service
USAV
one toss for service after the service is authorized. ball must be tossed or released before contact.
NFHS
After the ball is released for service, it may be caught or allowed to drop to the floor to get a re-serve.
Time allowed for service
USAV
8 seconds
NFHS
5 seconds
legal contact
USAV
In USAV rules for playing volleyball, it is legal for the ball to be played anywhere on the body.
NFHS
In high school, the ball can only be played by a body part on or above the waist.
(This high school rule is changing in 2009)
contact with net cables outside of the net
USAV
legal unless contact interferes with play or used for support
NFHS
In high school rules for playing volleyball, contacting the cables is a net violation.