[lcsmw]

If it wasn't natural previously and common practice, should have it been alerted?

[nige1]

 barmar, on 2016-March-19, 20:15, said:

I read that the ACBL Board of Directors passed a resolution this week that 1NT with a singleton A, K, or Q should now be considered natural, as it has become common practice among good players. Not to mention there was an article in the Bridge Bulletin a few months ago that recommended it.

An indictment of the previous ethics of good ACBL players?

[aguahombre]

 nige1, on 2016-March-20, 18:54, said:

An indictment of the previous ethics of good ACBL players?

I find the ethics of good ACBL players to be just fine in this regard. They don't have any special ways of uncovering the singleton; if partner xfers to that suit, they accept the transfer.

The ethics at lower levels are a different matter after opening nt with unbalanced shapes.

[barmar]

 lcsmw, on 2016-March-20, 13:36, said:

If it wasn't natural previously and common practice, should have it been alerted?

Only if the partnership has an agreement to open 1NT with singletons, rather than occasionally deciding to do it based on individual judgement.