One – Seven
The ACBL, however, has added several words that alert opponents to unusual bidding:
Stop — Bidders say “Stop” prior to jumping the bidding (such as with a weak 2 or splinter bid) to give opponents time to consider their bids.
Alert — A warning to the opponents that the last call by your partner has been assigned a conventional message.
Announcement — A word or phrase that directly describes the meaning of partner’s call. This is part of the Alert process and is used primarily in three cases: to describe partner’s range when opening 1NT (such as 15-17 or 16-18 high-card points); when the partnership uses a Jacoby transfer bid following an NT opening; when the partnership uses a forcing 1NT response.