ACBL Club game. Both A pairs. Match points.
I think this is benign as I don't think it would have any effect on the outcome but I thought it was interesting.
I didn't see the rest of the auction but E declared in 6NT making 7 for a top board. N called me to the table after E opened 1♣, W alerted the bid and S overcalled 2♥. S did not inquire about the alert prior to making his bid. N advised me away from the table that his partner's bid had different meanings if the 1♣ bid was precision v. a forcing 1♣ opening - N said their agreement with a natural or forcing 1♣ bid, he would be showing ♥ only; if the opponents used precision, his bid would show ♥ and a minor. He was concerned that W might claim damage if he (W) called without this information - the information being that S's bid had more than one possible meaning at that point - and that he (N) couldn't ask what the alert was since it wasn't his turn to call (Rule 20F.1.). I told him that, based on this information and the auction to this point, he should alert his partner's bid. If W inquired about the alert, he would then have the right to ask E about W's alert. Now knowing the meaning of the 1♣ bid, N may correctly answer W's inquiry.
Of course, as it turned out, W did not inquire so it was a moot point. However, I believe my answer was correct in that I was attempting to avoid a call being made by W without access to information that he was entitled to. Do you agree with my ruling? The alternative would be for N to remain silent until his turn to call, then inquire about the alert, and then alert his partner's bid. That just doesn't seem right to me.