[Cascade]

Quote

Most cuebids are not Alertable. However, any cuebid which conveys a very unusual or unexpected meaning still requires an Alert.

Does this apply to control showing cue-bids or is it restricted to bids in the opponents' suits?

What about in an auction where suit agreement is implicit and another player may not even realize you have slipped into cuebidding?

2NT 3♥
4♣ 4♦ ...

After a transfer auction is their any need to alert (including delayed) 4♣ and 4♦?

I certainly would where I play. And I checked with an ACBL player and he said that he did too but after I raised the question he said maybe he didn't need to.

[blackshoe]

The alert regulation has a "definitions" section in which "cue bid" and "control bid" are separately defined. The former refers to bids of an opponent's suit in a contested auction, the latter to bids in a suit other than the agreed trump suit to show first or second round control. Control bids are not directly referenced in the body of the regulation at all. I conclude that the section on cue bids, which doesn't say much more than, as has been said, "most cue bids do not require an alert", does not refer to control bids. Control bids fall under the general "most conventional or artificial bids require an alert".

That said, I don't think anyone actually does alert them, perhaps at least in part because they would usually require a delayed alert, and nobody makes delayed alerts. At least, that's my impression.