bluejak, on 2012-January-18, 20:10, said:
EBU regulations require you to state the range, so "15-17 or equivalent playing strength" is illegal, "three honour tricks" is illegal, and "a six-loser hand" is illegal.
I suppose you could argue you could get away with "18-20 on the 6-4-2-1 scale", but there are a lot of problems created by that even being on the SC.
The regulations say:
OB 5B8 said:
Always use a consistent form of wording when announcing, preferably the recommended form.
OB 5C1 said:
Natural 1NT openings are announced by stating the range, eg by saying 12 to 14.
Under rules for agreements we have:
OB 10A3 said:
A partnership may define the strength of a hand by using any method of hand
evaluation that will be understood easily by its opponents (eg High Card Points,
Playing tricks, Losing Trick Count, etc). Regardless, your agreements must meet the
permitted minimums defined in terms of HCP and Opening Points (as in 11 C 1 and 11
F 2, for example).
Which suggests, I think, that using an alternative method to define your range is acceptable (subject to being 'easily understood') and therefore it should be announced using that range. The question, I guess, is whether "at least the playing strength of an average 15 count balanced hand and at most a the playing strength of a good 18 count" is a range or not. I think it probably is.
Certainly the wording of announcements specified in the regulations is optional (per 5B8)