mycroft, on 2014-March-10, 11:46, said:
Art: before this came in, I didn't have to care, because natural 2-bids weren't conventions, so I didn't have to worry about their legality (except where DISALLOWED, 7 came into play). If they wanted to play 8-13 and call it weak, they could (as long as they disclosed properly). If they wanted to play 8-13 and call it "an opening bid" (which I've done before - Yes, Alerted, yes, with proper disclosure) they could, too.
Once it's a convention, we have to find out what a "weak 2" is, not what people call it - and it has to be somewhere defined in conjunction with the GCC, not some random bulletin article teaching people how to play weak 2s - because we now have to know if the bid someone comes up with is legal. "We all know" what a weak 2 is, but "we all know" that 1NT is 15-17; "we all know" that Flannery promises 4♠5♥; we also know that there are legal bids that aren't those.
Re: the weak NT: Playing EHAA, my NT in third seat is 8-"we don't have game"; say 15 or so. Yep, legal. Yep, everything's natural after that - including 3♣ "we might have game; I have 10-12 and 4 clubs" (and by inference from the initial pass, 4441) and 3♦ "we might have game I have 10-12 and 4 diamonds" (almost by inference from the pass and failure to bid 3♣, 4=4=4=1). No, it never came up. Yes, we were prepared with a copy of the GCC when we played it, because someone always called the TD, and that just saved her a trip back for the GCC :-).
Given the authority for the definition of a "weak 2 bid" on the ACBL website, if you don't want to follow "some random bulletin article teaching people how to play weak 2s," then I guess you will have to rely on the definition from The Bridge World glossery referenced on the ACBL website. As I stated in my prior post, that definition is:
An opening two-bid used to show a long suit and values below those for an opening one-bid.
That seems to me to be a reasonable definition for what consitutes a weak two bid, no matter what system you play. It doesn't defne the point count range (except in reference to whatever you are playing for an opening one-bid) and it doesn't define what is meant as "long" as in "long suit." So there is some leeway for those with less traditional views of what constitutes a weak two bid.
So, as long as the regulatory authority does not put any specific restrictions on what is and what is not a weak two bid, the definition from The Bridge World should work. If there are any specific restrictions (can't open a weak two bid on a four (or fewer) card suit, can't open a weak two bid with a range larger than 7 points, etc.), then you have to live within those restrictions.
By the way, I added "(or fewer)" just in case there was someone out there who would respond with "What about opening a weak two bid on a three card suit."