From another board

[AtlUmpSteve]

My answer:

ASA 10.3-B. "Under no circumstances will any umpire seek to reverse a decision made by an associate, nor shall any umpire criticize or interfere with the duties of their associate(s), unless asked to do so. Similar wording exists in every other ruleset and mechanics manuals.

I may be missing the part inferred by others, but this doesn't say or differentiate between a judgment call and a rule application. Under NO CIRCUMSTANCES.

There is only one right way to deal with this. Stay out of it. If a coach asks, you refer him to the umpire that made the call. Only if/when your partner asks do you suggest in live time it may have been a wrong rule application. Interfere on your own, and your interference is not only inappropriate and illegal, but any call reversal is now protestable, since YOU violated a rule seeking the reversal.

Post-game, have at it.