Many of you may remember the board above as Board 4 with Joanna Stansby declaring 6♣ from the Spring 1999 Vanderbilt and being famous for the "Oh, sh&#" ruling.
The present wording of Law 45C4(b) for changing an unintended played card from dummy includes the following:
"Declarer may correct an unintended designation of a card from dummy until he next plays a card from either his own hand or dummy. A change of designation may be allowed after a slip of the tongue, but not after a loss of concentration or a reconsideration of action."
The play was (1) singleton heart led to dummy's king, (2) low diamond from dummy to RHO's ace and ruffed by declarer, (3) low club to dummy's queen, and (4) declarer calls "low spade", RHO plays the ♠K, declarer says "Oh, Sh&#", etc. (more below on the "etc")
Under the present laws, it appears clear to me if declarer, before playing any card from her hand following RHO's ♠K, calls the Director, this appears to be a clear cut use of Law 45C4(b) with declarer being allowed to change the "low spade" to a "low club".
However, let's assume instead that declarer knows she could now claim 12 tricks and absentmindedly calls "low spade" at Trick 4, but this time she does NOT notice RHO's ♠K, and then places the ♣A on the table and is about to claim when dummy says "no spades, partner?", quickly followed by declarer realizing what has happened and calling the Director.
It appears the ♣A is a played card, even though it will need to be replaced to follow suit, which would mean dummy's mis-called card cannot be corrected, and RHO is then free to give LHO a heart ruff to beat 6♣.
I personally dislike this part of the new wording of this law, and think it should be re-worded such that if the next trick has not started as in this case, that dummy's called card (first or second card played to the trick) can be corrected - however, it appears in my hypothetical example, declarer can't correct dummy's called card.
Does my interpretation appear correct?