Man findet im TCDS (Type Certificate Data Sheet- EASA) eines Flugzeuges einen Verweis auf das jeweilige Airplane Flight Manual, z.B. Piaggio Avanti, die ja single pilot zugelassen ist:

11. All-weather Capability

The airplanes are authorized to perform Category 2 (Cat II) operations according to the limitations included in the applicable Airplane Flight Manual

Im AFM findet man dann folgendes:

AIRPLANE FLIGHT MANUAL P.180 AVANTI II
LIMITATIONS
CATEGORY II OPERATIONS
Issued: October 21, 2005 Rep. 180-MAN-0010-01100
Page 2-31

2.22 CATEGORY II OPERATIONS
a. CAT II approaches are approved only with dual qualified pilots, both engines
operating and in mid or full flaps configurations.
b. Autopilot and yaw damper must be coupled and both FD1 and FD2 bars in view