What is a crossing line fault in volleyball?

A crossing line fault (centerline violation) occurs when a player completely crosses to the opponent's side of the court at floor level. A player may partially cross if some part of their foot or hand remains on or above the centerline.

Full Explanation

Per FIVB Rule 11.3.3, it is a fault to fully cross the centerline with a foot or hand onto the opponent's side of the court. However, a player may partially cross the line if at least some part of the crossing foot or hand is still on or above the centerline. Parts of the body above the floor (legs, arms, torso) may cross the plane of the net provided they do not interfere with the opponent's play. Crossing the centerline with the entire foot or hand results in a point for the opponent. NFHS Rule 9-5-3 and NCAA rules follow the same standard.

Rulesets covered: FIVB/USAV/NFHS/NCAA  |  Rule Reference: FIVB Rule 11.3.3; NFHS Rule 9-5-3