US based website of American or Etihad or Jet.
Very difficult to get human answer, let alone a correct one.
Many years ago when Jet used to fly to US, in spite of stopover, full international aloowance was allowed. But ground staff gave a lot hard time in spite of printed web pages of Jet (that time web page was clear)
A recent data point on this forum tend to be more reliable. I am sure someone from US/Europe must have done a single PNR with stopover multi-city trip.
Problem with Iba forum is that people ask the questions but other than handful regulars most dont bother to post replies. (or even come back and provide data point of their experience for which they got useful advice here)