The volleyball libero:
- Plays only in the back row
- Can replace any one position in the back row (for instance, the libero can play back row for both middle blockers)
- Wears a different color jersey than the rest of the team
- Does not count as a substitution
The libero cannot:
- Serve (except in the NCAA women's game due to a rule modification in 2004)
- Attack the ball above the height of the net
- Block
- Attempt to block
- Set an attacker from the front court
