My understanding is that in a bridge tournament, that the declarer must pause for some time (X seconds) after the dummy goes down, in order to study it, before playing to the first trick.
What is that time interval (i.e. what is X in terms of seconds)? Does this apply if dummy has a "forced" play such as a singleton in the led suit?
My further understanding is that East is allowed to take this pause (for X seconds) if, for some reason, declarer doesn't. Is this the case? And is East allowed to take an additional X seconds (or more) if declarer takes X seconds for study?