In volleyball, the libero must stay in the back row and cannot play in the front row. If rotation causes the libero to move to the front row position, a replacement occurs, usually through a designated libero replacement system.
In volleyball, the libero is a defensive specialist who is restricted from certain actions, such as attacking the ball above the net height when the ball is in front-row play. The libero is not allowed to rotate to the front row; they must remain in the back row at all times. In terms of positioning, they cannot overtake responsibilities normally designated for the front-row players, and they forgo the right to serve, block, or attempt to block.
Thus, when play shifts and the libero finds themselves in the front row area due to rotation, a replacement must occur. This is typically managed through a libero replacement system, where the libero switches with a specific player designated for the front row without counting as a regular substitution. This allowing for the libero to consistently operate from the back row, where they are most effective in defending against the opposition's attacks.