Question id 135 - Air Law - ATPL - Airline Transport Pilot license

Two consecutive periods each of three month in the case a flight crew member of an aircraft engaged in non-commercial operations.
A single period of three month in the case of a flight crew member of an aircraft engaged in commercial operations.
A single period of six month in the case of a flight crew member of an aircraft engaged in non- commercial operations.
Two consecutive periods each of six month in the case of a flight crew member of an aircraft engaged in non-commercial operations.