RMB1, on 2014-May-28, 02:24, said:
If North was about to bid 5♣ and that would lead to a good score for the opponents, and South could have known that bidding would be bad, and South's intervention effectively prevented North from bidding, then there must be a case for Law 23.
TFLB L23 Awareness of potential damage said:
Whenever, in the opinion of the Director, an offender could have been aware at the time of his irregularity that this could well damage the non-offending side, he shall require the auction and play to continue (if not completed). When the play has been completed the Director awards an adjusted score if he considers the offending side has gained an advantage through the irregularity.
L23 can empower a director to decide an event by applying it. The director must decide whether the law-breaker could have been aware of potential damage (e.g. the law-breaker might be too stupid or ignorant).
Crucially, its application depends neither on the ethics/intentions of the law-breaker nor on what he was actually aware. Hence, L23 is applicable to most irregularities that result in inadequate restitution for damage to non-offenders. In practice, to such cases, directors apply it only occasionally and selectively. This inconsistency can appear unfair to players. IMO, where relevant, L23 should be uniformly enforced. Failing that, it should be scrapped.