I had a routine application of Law 45C4(b) ("... may change an unintended designation ... without pause for thought"), except that the next player had managed to play a card.
Declarer called for ♦10 from dummy and then said he meant ♣10, he said he had been looking at the dummy's clubs at the time, but RHO had followed to ♦10 with ♦7. I was content that the designation had been inadvertent and ruled that the ♦7 can be withdrawn (and must be, if RHO has a club) and that ♦7 was authorised to the LHO and unauthorised to declarer, and to call me back if the defence felt damaged.
Then I checked this in the law book, which said what I thought it said, but Law 45C4(b) ends with "see Laws 47D and 16D1". Law 16D says that withdrawn actions are authorised to non-offenders (16D1) and unauthorised to offenders (16D2). Elsewhere in the laws, there are references to Law 16D or specifically to Law 16D2, but this is the only reference to Law 16D1. I don't understand why the laws have gone out of their way to specify just Law 16D1 here.
- Do the laws think there is no offending side in Law 45C4(b)?
- Specifically, was information arising from ♦7 authorised to declarer?
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