LAWS OF DUPLICATE CONTRACT BRIDGE 1997

CONTENTS | INDEX
LAWS
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LAW 40 | _ PARTNERSHIP UNDERSTANDINGS_
A. | Right to Choose Call or Play
| A player may make any call or play (including an intentionally misleading call — such as a psychic bid — or a call or play that departs from commonly accepted, or previously announced, use of a convention), without prior announcement, provided that such call or play is not based on a partnership understanding.
B. | Concealed Partnership Understandings Prohibited
| A player may not make a call or play based on a special partnership understanding unless an opposing pair may reasonably be expected to understand its meaning, or unless his side discloses the use of such call or play in accordance with the regulations of the sponsoring organisation.
C. | Director’s Option
| If the Director decides that a side has been damaged through its opponents’ failure to explain the full meaning of a call or play, he may award an adjusted score.
D. | Regulation of Conventions
| The sponsoring organisation may regulate the use of bidding or play conventions. Zonal organisations may, in addition, regulate partnership understandings (even if not conventional) that permit the partnership’s initial actions at the one level to be made with a hand of a King or more below average strength. Zonal organisations may delegate this responsibility.
E. | Convention Card
| 1. | Right to Prescribe
|  | The sponsoring organisation may prescribe a convention card on which partners are to list their conventions and other agreements and may establish regulations for its use, including a requirement that both members of a partnership employ the same system (such a regulation must not restrict style and judgement, only method).
| 2. | Referring to Opponents’ Convention Card
|  | During the auction and play, any player except dummy may refer to his opponents’ convention card at his own turn to call or play, but not to his own (12).
|  | (12) A player is not entitled, during the auction and play periods, to any aids to his memory, calculation or technique. However, sponsoring organisations may designate unusual methods and allow written defences against opponents' unusual methods to be referred to at the table.

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