In the game of bridge, skill in choosing a bid or play is emphasized. A strict code of ethics and courtesy is part of the game. The purpose of the Proprieties contained in Chapter VII, Laws 72 to 76 is to make the Game of Bridge more enjoyable for everyone, no matter what the situation.

The Laws of Duplicate Contract Bridge

CHAPTER VII
Proprieties
LAW 72 - GENERAL PRINCIPLES
A. Observance of Laws
	1. General Obligation on Contestants
		Duplicate bridge tournaments should be played in strict accordance with the laws.
	2. Scoring of Tricks Won
		A player must not knowingly accept either the score for a trick that his side did not win or the concession of a trick that his opponents could not lose.
	3. Waiving of Penalties
		In duplicate tournaments a player may not, on his own initiative, waive a penalty for an opponent's infraction, even if he feels that he has not been damaged (but he may ask the Director to do so - see Law 81C8).
	4. Non-offenders' Exercise of Legal Options
		When these Laws provide the innocent side with an option after an irregularity committed by an opponent, it is appropriate to select that action most advantageous.
	5. Offenders' Options
		Subject to Law 16C2, after the offending side has paid the prescribed penalty for an inadvertent infraction, it is appropriate for the offenders to make any call or play advantageous to their side, even though they thereby appear to profit through their own infraction.
	6. Responsibility for Enforcement of Laws
		The responsibility for penalizing irregularities and redressing damage rests solely upon the Director and these Laws, not upon the players themselves.

B. Infraction of Law
	1. Adjusted Score
		Whenever the Director deems that an offender could have known at the time of his irregularity that the irregularity would be likely to damage the non-offending side, he shall require the auction and play to continue, afterwards awarding an adjusted score if he considers that the offending side gained an advantage through the irregularity.
	2. Intentional
		A player must not infringe a law intentionally, even if there is a prescribed penalty he is willing to pay.
	3. Inadvertent Infraction
		There is no obligation to draw attention to an inadvertent infraction of Law committed by one's own side (but see footnote to Law 75 for a mistaken explanation).
	4. Concealing an Infraction
		A player may not attempt to conceal an inadvertent infraction, as by committing a second revoke, concealing a card involved in a revoke, or mixing the cards prematurely.