7.I. A live ball in play that is stopped by a player before it becomes dead except for a valid fault call against an opponent or themselves (e.g., catching or stopping a ball in flight before it makes contact with the playing surface). The fault is on the player who stopped the ball.

8.X A player may stop play without penalty in an officiated match to call a valid fault against an opponent or themselves. If the referee determines that the fault called by the player did not occur, it is a fault against the player who called the invalid fault.

7.I. A live ball that is stopped by a player before it becomes dead (e.g., catching or stopping a ball in flight before it makes contact with the playing surface). The fault is on the player who stopped the ball.

This rule codifies that a player may stop play without penalty in officiated matches to call a valid fault against an opponent. If the referee determines that the fault called by the player was not valid, it is a fault against the player who called the invalid fault.

Scenario 1: The server for Team A serves from the wrong position. Team B stops play before returning the serve and calls a fault on Team A before the referee does. The referee confirms the incorrect position of the server and enforces the incorrect position fault against Team A.

Scenario 2: Team A serves a ball that lands just beyond the NVZ line. Team B returns the serve just before the ball bounces twice. Team A stops play claiming that the ball bounced twice. The referee saw that the ball did not bounce twice and calls a fault on Team A for stopping play before the ball became dead.