If I had to poll this hand after 4♣ pass pass ... I would like to know your agreements for 2♠. If it is a decent 6-9 and support 3+ I guess almost everyone I know would bid 4♠. So I think that even pass is not a LA. But the opps wont argue this result I guess ;)
[hv=pc=n&s=skj96ha764d76c742&w=sq7432ht83dqt8ct6&n=s85h2dakj9432ckq9&e=sathkqj95d5caj853&d=s&v=b&b=7&a=pp2ndp3sppp]399|300[/hv] Experts NS and EW Teams After EW went for -4 they called me. 2NT was clearly a psych and the convention card stated "rare" at that chapter. This was the second time this match that this pair bid 2NT as a psych(admitted). EW stated too that dbl wasn't the best action to take; they have no agreements over dbl in this situation. Dbl after an opening of 1NT means ♠ and ♥. South stated: "be happy I didn't double" How do you rule
So you rule that West has POOT (Law 30) but I think you don't need that. Law 24B is clear. The card stays face-up, East must pass when it is his turn to call and the auction goes on.
I would like to stipulate one possible violation. 41B "the leader’s partner ...may require a review of the auction, or request explanation of an opponent’s call" but only after a face-down opening lead.