lamford, on 2013-May-27, 16:31, said:
It says that the TD must be called for "an erroneous explanation", because it means exactly that. It does not say, nor imply, that the TD must be called for a failure to alert. Nor do the TDs I asked think they should be called, unless it is thought the opponents might be damaged or might want to change their last call, or, at the end of the auction, if they might have been damaged.
No, it says that what you do when you call the TD (as you must) is inform the opponents that partner's explanation was erroneous. It does not say "the player (who was identified by 20F5a) doesn't need to call the director in all the circumstances described (in 20F5a)". It may be clumsily worded, but it doesn't have the meaning you claim, either literally or through a common sense interpretation.
Did those TDs you consulted explain who decides if there might have been damage, for instance in the case of an inexperienced NOS?