So there can be UI caused by a BIT during the bidding, but not during the play? Why? Anyone who has watched the USBC's knows exactly what I mean. I have never seen a call made against players who signal their high cards through a BIT. From the laws: "During the auction and play, communication between partners should be effected only by means of the calls and plays themselves. Calls and plays should be made without special emphasis, mannerism or inflection, and without undue hesitation or haste." (emphasis added). Bobby Wolff "2. Never break tempo as a defender if the slow choice of what you eventually decide could be thought to be unauthorized information (UI) to partner. If the break in tempo (BIT) occurs, partner should lean over backwards to follow your suggestion (even if he suspects by doing so he is possibly committing bridge suicide), rather than taking advantage of the UI". http://judy.bridgeblogging.com/2013/03/27/the-controversial-disposition-of-the-semi-final-vanderbilt-appeal/