From the Code:
"Player makes calls on own side of net. A player calls all shots landing on, or aimed at, the player’s side of the net."
OP already quoted the rule that an official should not overrule unless he witnessed a problem with a player's call, such as wrong or late.
Why do you keep asking for a more specific rule than that?
-- Random Error Generator, Version 4.0
-- Master Moonballer