A. Proper Form
A bid designates a number of odd tricks (tricks in excess of six), from one to seven, and a denomination. (Pass, double and redouble are calls but not bids).
B. To Supersede a Bid
A bid supersedes a previous bid if it designates either the same number of odd tricks in a higher-ranking denomination or a greater number of odd tricks in any denomination.
C. Sufficient Bid
A bid that supersedes the last preceding bid is a sufficient bid.
D. Insufficient Bid
A bid that fails to supersede the last preceding bid is an insufficient bid.
E. Rank of the Denominations
The rank of the denominations in descending order is: no trump, spades, hearts, diamonds, clubs.
F. Different Methods
Regulating Authorities may authorize different methods of making calls.
Law 17 - THE AUCTION PERIOD | Law 19 - DOUBLES AND REDOUBLES |