blackshoe, on 2017-February-25, 15:13, said:
Failure to call the TD is only an infraction if attention is drawn to an irregularity.
At our club, the SB draws attention to all irregularities if it is in his interest, so, at his table at least, there could be a director call every time there is an incomplete (but sufficient) designation if he followed your approach. On this hand, he did not call the TD when RR said "win", but quickly put the 8 of diamonds in place. If he had been a defender, he would have seen the danger arising, and he would have called the TD on each of the first six tricks, when the rabbit called "king" at trick one, "spade" at trick two, "ace" at trick three, "heart" at trick four, "ace" at trick five and "club" at trick six. RR, by now, might well have specified the suit and rank of the diamond he intended, rather than say "win it", so RR's chance of success would have dropped to around 1 in 4 (as he would just have guessed which diamond to play).
Molly the Mule always gives the minimum specification, and has been doing so for seventy years. She would have irritated people by just saying "five" if she crossed to the ace of spades and continued the suit, knowing that dummy would be deemed to play the five of spades, the suit "in which" dummy won the last trick. So, every time Molly is declarer, there could be 12 director calls (or 13 if you would regard her failure to specify the rank and suit at trick 13 as also an infraction) per round. In my opinion, the TD should be called only if there is an infraction of a "must" or "may not" regulation. There I agree with you. Do you think that someone not specifying the suit, but specifying the rank of a suit that is led is an infraction? In my opinion, if the Laws cover which card is played when there is an incomplete call then the TD does not need to be called.
I prefer to give the lawmakers credit for stating things for a reason - barmar