IMPs; West originally opened 1C out of turn. EBU
This was from actual play, and was one unclear point from a seminar for club directors conducted by Vampyr and this author recently. West had opened 1C out of turn, playing a weak NT, better minor and 5-card majors. North did not accept it, and South tried to put a spanner in the works with a fruity weak 2S, after the TD had read the relevant laws when called.
a) Is 2NT a comparable call? The original 1C now tells East that West does not have five hearts, nor longer diamonds than clubs, but that information is not especially useful.
b) Should West be told whether 2NT will be accepted before making the call, as otherwise he will clearly try 3NT, not risking a missed game? If he does this, East will know that it is likely to be shaded, and that is unauthorised I presume?
Of course, 6NT makes on the hand with North getting squeezed fairly simply without declarer having to risk the heart finesse.
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The offender can ask the director if 2N would be a "comparable" call.
IMO it isn't but I concede that is a matter of judgement.
The commentary on the laws apparently recommends that the director ask the offender's partner about meanings of possible replacement calls to establish if any are "comparable". That way madness lies. Except that the inmates already run the asylum
A problem with rules that mandate unnecessarily subjective rulings is that they can allow the director to decide who wins a tournament on a seeming whim. Inevitably, that engenders suspicions of bias.
Clumsy kludges (like the rules about illegal calls) could easily be made more simple and objective (e.g. Cancel offending call, silence offender's partner).
Rule-makers reflexively reject such suggestions because they compromise a "normal table-result". I agree with Vampyr, however: "That bird has flown"