barmar, on 2012-December-05, 15:50, said:
In general, I think the regulation is only likely to be enforced if the opponents make an issue of it, and most players in national events are not interested in playing Secretary Bird over CCs.
You are right that there will certainly be no enforcement if the opponents don't bring the problem to the director's attention, but even then it's questionable. Two examples from SF where I did play Secretary Bird a bit:
First session of LM Pairs - last round: Opponents have two convention cards on the table with lots of bidding agreements filled out, but zero about leads and carding. I'm declarer, and one of them has an attitude problem when I question this, so I call the director. Director's reaction: "Get it filled out by the next session" So it's no problem that their opponents didn't have access to this all session, or that we don't for the last two boards. They were playing upside down carding, btw. I didn't find out about their honor leads.
Second day of Blue Ribbons we had a non-alerting issue which required the presence of the director. I mentioned as a side point to the director (not in opps presence) that my opponents apparently had only a WBF convention card - no ACBL card in sight.
I played the same pair in the second session of the final day, and there was still just one folded up WBF card in sight. Why bother requiring an ACBL card if the director isn't even going to do anything when non-compliance is called to their attention?