bluejak, on 2011-June-17, 07:59, said:
The recommended method is to ask what he meant by the insufficient bid. (snip)
FWIW, my (current and very shaky) viewpoint is that so long as offender has not restricted the possible intended meanings by some extraneous remark or gesture, he may choose a call whose meaning is fully contained within that set. In my example above, the player would be allowed to replace 2H with 4H. (Had he said something at the table like, "Oops, thought you bid 1H", or similar, that would restrict the set of possible intended meanings and thus restrict the allowable 27B1b replacements.)
So, I suppose, that means one should offer the following: "When we return to the table, (LHO) will have the opportunity to accept your insufficient bid. If not, you can replace it with (27B1a) without penalty. If not, you may choose to replace it with a call with a meaning at least as precise as the insufficient bid, and there will be no penalty. If you want to do that, you must tell me now so I can rule on whether or not your proposed call meets the criteria. Otherwise, you may choose any call and partner will be barred." Which, of course, is too complicated for club level, but it might be a sensible way to proceed with more experienced competition.
I'm not sure I can find solid textual support in laws for this viewpoint, although I do think the parenthetical clause of 27B1b points that way. That is, I read
"(such meaning being fully contained within the possible meanings of the insufficient bid)"
as
"(such meaning being fully contained within the possible intended meanings of the insufficient bid)".
(Postscript: I know the issue of what knowledge LHO is entitled to before he chooses to accept/reject has come up before, but I don't remember if there was consensus. IIRC, there seemed to be support for the view that LHO is entitled to know which calls will be allowed under 27B1b (and 27B1a, if applicable) -- and presumably the meanings of those calls.)