Airline Transport Pilot Licence

The Airline Transport Pilot License (ATPL) is the highest level of aviator qualification or license. Those certified as Airline Transport Pilots are authorized to act as pilot-in-command of an aircraft having a maximum weight over or having over 9 passenger seats. 
Any pilot operating an aircraft for money must start by obtaining a Commercial pilot licence (CPL).
Theoretical subjects included for ATPL applicants are: