No-up to 10 segments and within those you can include up to 3 stops . AC will actually call it 2 stops and a Point of Turnaround. A stop is defined as over 24 hours.

There's a wealth of information available in this (and if memory serves me somewhere in there someone put a spreadsheet together of various booked journeys

http://www.flyertalk.com/forum/air-c...ineraries.html