jh51, on 2012-May-25, 14:00, said:
After the bidding was complete, North informed us of South's failure to announce his transfer bid. South mentioned that she remembered that 4♥ was a transfer when I looked at her partner's convention card.
Since South woke up when I looked at her partner's convention card, is the AI or UI? I would think UI, but I am not a rules expert.
We would be aware precisely when South woke up if South had obeyed law 20F4 that says she must immediately call the director at the point of becoming aware of the misexplanation.* If called at precisely the point in time mentioned, East can still have his call again, though in fact in the present case East is probably happy about his call. But probably just as importantly, it assures West that East's call is not affected by MI.
Whether the opponent's action of looking at a convention card, which is equivalent to asking for the meaning of a bid, is AI/UI is irrelevant to the present case. What precedent consistently shows is that if you are woken up to a fact about your own system following from the opponents enquiring about your system, that relevant fact about your own system is now certainly UI.
*A very curious fact about 20F4 is that everyone seems to assume that the procedure under 20F4 case includes a corrected explanation following the attendance of the director, but actually the law does not say so. It instructs the player only to call the director, not to correct the explanation, even after calling the director. The director is instructed to apply certain laws, but they do not mention getting a corrected explanation out of the player. This omission might be thought significant because in the other case, correcting your partner's (never corrected) misexplanation, the law does instruct you to give a corrected explanation, and when to give it.