IMPs (teams of 8, converted to VPs). North's 2NT was alerted by South as showing the minors. After I (East) passed, South changed the explanation to "a strong balanced hand". I declined the option to change my pass, and then both partner and I checked the NS CC and found that the second explanation was correct.
After the auction I reserved my rights as I felt that North might have used UI (from partner's explanation) in pulling 3NT to 4C. 5C made when I led a spade rather than the HA, while 3NT is one off on the same lead.
The TDs (two of them) seemed to believe that there was nothing wrong here as EW eventually got the correct explanation. Despite partner and I pointing out that this was a UI case, not an MI case, they refused to even consider adjusting the score - though it wouldn't have affected the outcome of the match either way. I was somewhat surprised by this ruling, as I felt this was a classic case of "unauthorized panic" - did I miss something?
(If you'd have asked North why he pulled 3NT to 4C: at the table he said that he pulled 3NT to 4C because he felt partner must have "a very strong hand" to bid 3NT over 2NT, and was hence bidding Minorwood, asking for keycards in clubs. South however didn't seem to agree that 4C would be Minorwood there, as suggested by his 5C "response".)
ahydra