3.A.19. Live Ball – The timeframe from when the referee or server (or server's partner per rule 4.D.1) starts to call the score.

3.A.X. Ball In Play – The timeframe during which a rally is played, from the hit of the ball to make the serve until the ball becomes dead.

7.I. A live ball in play 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.

3.A.19. Live Ball/In Play – The point in time when the referee or server (or server's partner per rule 4.D.1) starts to call the score.

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.

Live ball and in play are different spans of time and therefore should be defined differently.