JAR-OPS 1 establishes that, a co-pilot is not assigned to operate at the flight controls during take-off and landing unless:

【单选题】
A he has carried out as-pilot-in-command or as co-pilot at least three take-off and three landings in an airplane or an approved flight simulator of the type used, in the preceding 30 days
B he has carried out at least three flights as pilot-in-command or as a co-pilot at the controls of the type to be used, in the preceding 90 days.
C he has operated as pilot-in-command or as co-pilot at the controls during take-off and landing of the type to be used in the preceding 90 days.
D he has carried out as pilot-in-command or as co-pilot at least three take-off and three landings in an airplane or an approved flight simulator of the type used, in the preceding 90 days.

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