LAW 25 - LEGAL AND ILLEGAL CHANGES OF CALL

1. Unintended Call
   1. If a player discovers that he has not made the call he intended to make, he may, until his partner makes a call, substitute the call he intended for the unintended call. The second (intended) call stands and is subject to the appropriate Law, but the lead restrictions in Law 26 do not apply.
   2. If the player's original intent was to make the call selected or voiced, that call stands. A change of call may be allowed because of a mechanical error or a slip of the tongue, but not because of a loss of concentration regarding the intent of the action.
   3. A player is allowed to replace an unintended call if the conditions described in A1 above are met, no matter how he may have become aware of his error.
   4. No substitution of call may be made when his partner has made a subsequent call.
   5. If the auction ends before it reaches the player's partner no substitution may occur after the end of the auction period (see Law 17D).
   6. If a substitution is allowed the LHO may withdraw any call he made over the first call. Information from the withdrawn call is authorized to his side and unauthorized to the opponents.
2. Call Intended
   1. A substituted call not permitted by A may be accepted by the offender's LHO. (It is accepted if LHO calls intentionally over it.) The first call is then withdrawn, the second call stands and the auction continues (Law 26 may apply).
   2. Except as in B1, a substitution not permitted by A is cancelled. The original call stands and the auction continues (Law 26 may apply).
   3. Law 16C applies to any call withdrawn or cancelled.