Nowhere in bridge laws do I see undo for an exposed card. The undo for play should be eliminated because it is there even if director states undo for bids only. Allow 5 second for an undo bid request if partner not bid and no need for delay acceptnce At very least have the two options (bids and play)separate for directors. ACBL Law: A. Unintended Call 1. Until his partner makes a call, a player may substitute his intended call for an unintended call but only if he does so, or attempts to do so, without pause for thought. The second (intended) call stands and is subject to the appropriate law. 2. No substitution of call may be made when his partner has made a subsequent call. 3. If the auction ends before it reaches the player’s partner, no substitution may occur after the end of the auction period (see Law 22). 4. If a substitution is allowed, the LHO may withdraw any call he made over the first call. Information from the withdrawn call is authorized only to his side. There is no further rectification.