CHAPTER V
THE AUCTION 

PART I
CORRECT PROCEDURE

SECTION ONE
AUCTION PERIOD

LAW 18 - BIDS 

A. Proper Form

A bid names a number of odd tricks, 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 names 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 immediately previous bid is a sufficient bid.

D. Insufficient Bid

A bid that fails to supersede the immediately previous bid is an insufficient bid.

E. Rank of the Denominations

The rank of the denominations in descending order is: notrump, spades, hearts, diamonds, clubs.

F. Different Methods

Zonal Organisations may authorise different methods of making calls.