I'm not sure what you are saying? It doesn't matter that you are in the same theater, you still can't exceed the duty time limitations for an Augmented Crew whether in "theater" or not.

While all of us will have headaches processing all the upcoming FAR 117 changes, I don't think your CONUS-S. America example will be changing from current practice.

In this case (NOT CONUS-Europe or CONUS-Asia) the crews are acclimated for the entire duration of the trip. No extra long layover is required to make the acclimatization rules fit.

Therefore the way I read it, even with a "Class 3" facility (three-man crew, non lie-flat seat that reclines at least 40 degrees) and the typical depart-at-night scenario for the GRU-EWR return leg, you still have a 13 hour duty day in which to conduct the flight--which means nothing should change from current trip construction.

Am I missing something here? (I well may be).