Time period Transitions

Does a train that originates in a different period follow that one or the one it's currently in?

Ex: An A train starts at Far Rock. before 6:30AM. During its run, 6:30AM comes and goes. Does it become an express or does it work as a local until it reaches 207?

Amtrak7,

Timetable questions can be answered by calling 718.330.1234.

-G-

Or you can go to http://mta.info/nyct/service/schemain.htm. Who would think the subway would have posted timetables?

Those don't show every stop, or at least a wide palette of them.

The timetable does answer your question. It doesn't show each stop but it shows which train run express. Trains start running express out of Far Rockaway before 6 am though they start running express after Euchlid ave.