LAW 21 - CALL BASED ON MISINFORMATION

A. Call Based on Caller's Misunderstanding

No rectification or redress is due to a player who acts on the basis of his own misunderstanding.

B. Call Based on Misinformation from an Opponent

1. (a) Until the end of the auction period and provided that his partner has not subsequently called, a player may change a call without other rectification for his side when the Director judges that the decision to make the call could well have been influenced by misinformation given to the player by an opponent (see Law 17E). Failure to alert promptly where an alert is required by the Regulating Authority is deemed misinformation.

(b) The Director is to presume Mistaken Explanation rather than Mistaken Call in the absence of evidence to the contrary.

2. When a player elects to change a call because of misinformation (as in 1 preceding), his LHO may then in turn change any subsequent call he may have made, without other rectification unless at the end of the hand the Director judges his withdrawn call to have conveyed such information as to damage the non-offending side in which case Law 16D applies.

3. When it is too late to change a call and the Director judges that the offending side gained an advantage from the irregularity he awards an adjusted score.

Law 20 - REVIEW AND EXPLANATION OF CALLS

Law 22 - PROCEDURE AFTER THE BIDDING HAS ENDED