From CAAP 14.
7.4.1
Flight Crew compliment and composition
Each ULR flight is to be operated by no less than four (4) pilots of whom two (2) must be pilot-in-command qualified.
The duty flight crew shall comprise at least two pilots of which one crewmember is pilot- in-command qualified.
My understanding of CAAP is that EK can be more conservative but not less.
Eg. CAAP defines ULR>16hr flt time and Ek defines ULR>14.
However CAAP also says down route rest must be 48hrs and cabin crew must have 3.5 hrs rest!!!